diff --git a/app/src/main/java/org/kiwix/kiwixmobile/intro/CustomPageIndicator.kt b/app/src/main/java/org/kiwix/kiwixmobile/intro/CustomPageIndicator.kt
index 1abe931ab..8c3e7591c 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/intro/CustomPageIndicator.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/intro/CustomPageIndicator.kt
@@ -171,7 +171,6 @@ class CustomPageIndicator @JvmOverloads constructor(
     val left = paddingLeft
     val top = paddingTop
     val right = width - paddingRight
-    val bottom = height - paddingBottom
     val requiredWidth = getRequiredWidth()
     val startLeft = left + (right - left - requiredWidth) / 2 + dotRadius
     dotCenterX = FloatArray(pageCount)
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/language/viewmodel/SaveLanguagesAndFinish.kt b/app/src/main/java/org/kiwix/kiwixmobile/language/viewmodel/SaveLanguagesAndFinish.kt
index 548704548..9444d4596 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/language/viewmodel/SaveLanguagesAndFinish.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/language/viewmodel/SaveLanguagesAndFinish.kt
@@ -17,7 +17,6 @@
  */
 package org.kiwix.kiwixmobile.language.viewmodel
 
-import android.annotation.SuppressLint
 import androidx.appcompat.app.AppCompatActivity
 import io.reactivex.Flowable
 import io.reactivex.android.schedulers.AndroidSchedulers
@@ -26,7 +25,7 @@ import org.kiwix.kiwixmobile.core.base.SideEffect
 import org.kiwix.kiwixmobile.core.dao.NewLanguagesDao
 import org.kiwix.kiwixmobile.core.zim_manager.Language
 
-@SuppressLint("CheckResult")
+@Suppress("IgnoredReturnValue")
 data class SaveLanguagesAndFinish(
   val languages: List<Language>,
   val languageDao: NewLanguagesDao
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/PeerGroupHandshake.kt b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/PeerGroupHandshake.kt
index c708fab40..6f7735e04 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/PeerGroupHandshake.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/PeerGroupHandshake.kt
@@ -44,6 +44,8 @@ import java.net.Socket
  */
 abstract class PeerGroupHandshake(private var groupInfo: WifiP2pInfo) {
   private val handshakeMessage = "Request Kiwix File Sharing"
+
+  @Suppress("InjectDispatcher")
   suspend fun handshake(): InetAddress? =
     withContext(Dispatchers.IO) {
       Log.d(TAG, "Handshake in progress")
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/ReceiverDevice.kt b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/ReceiverDevice.kt
index ff98cc03c..663f43221 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/ReceiverDevice.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/ReceiverDevice.kt
@@ -38,6 +38,7 @@ import java.net.ServerSocket
  * many times as the no. of files).
  */
 internal class ReceiverDevice(private val wifiDirectManager: WifiDirectManager) {
+  @Suppress("InjectDispatcher")
   suspend fun receive(): Boolean {
     return try {
       withContext(Dispatchers.IO) {
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/SenderDevice.kt b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/SenderDevice.kt
index 9978eee6d..4a55860e2 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/SenderDevice.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/SenderDevice.kt
@@ -48,6 +48,7 @@ internal class SenderDevice(
   private val wifiDirectManager: WifiDirectManager,
   private val fileReceiverDeviceAddress: InetAddress
 ) {
+  @Suppress("InjectDispatcher")
   suspend fun send(fileItems: List<FileItem?>) =
     withContext(Dispatchers.IO) {
       // Delay trying to connect with receiver, to allow slow receiver devices to setup server
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/adapter/WifiPeerListAdapter.kt b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/adapter/WifiPeerListAdapter.kt
index 28dfc1dc7..8b73a061d 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/adapter/WifiPeerListAdapter.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/localFileTransfer/adapter/WifiPeerListAdapter.kt
@@ -22,5 +22,5 @@ import org.kiwix.kiwixmobile.core.base.adapter.BaseDelegateAdapter
 
 internal class WifiPeerListAdapter(wifiP2pDelegate: WifiP2pDelegate) :
   BaseDelegateAdapter<WifiP2pDevice>(wifiP2pDelegate) {
-  override fun getIdFor(item: WifiP2pDevice) = item.deviceAddress.hashCode().toLong() ?: 0L
+  override fun getIdFor(item: WifiP2pDevice) = item.deviceAddress.hashCode().toLong()
 }
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/CopyMoveFileHandler.kt b/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/CopyMoveFileHandler.kt
index aa7a33375..93b02801c 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/CopyMoveFileHandler.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/CopyMoveFileHandler.kt
@@ -449,6 +449,7 @@ class CopyMoveFileHandler @Inject constructor(
     }
   }
 
+  @Suppress("InjectDispatcher")
   suspend fun deleteSourceFile(uri: Uri) = withContext(Dispatchers.IO) {
     try {
       DocumentsContract.deleteDocument(activity.applicationContext.contentResolver, uri)
@@ -458,7 +459,7 @@ class CopyMoveFileHandler @Inject constructor(
     }
   }
 
-  @Suppress("MagicNumber")
+  @Suppress("MagicNumber", "InjectDispatcher")
   private suspend fun copyFile(sourceUri: Uri, destinationFile: File) =
     withContext(Dispatchers.IO) {
       val contentResolver = activity.contentResolver
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/LocalLibraryFragment.kt b/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/LocalLibraryFragment.kt
index 172ea79dd..c35a9f20a 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/LocalLibraryFragment.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/nav/destination/library/LocalLibraryFragment.kt
@@ -484,6 +484,7 @@ class LocalLibraryFragment : BaseFragment(), CopyMoveFileHandler.FileCopyMoveCal
     }
   }
 
+  @Suppress("InjectDispatcher")
   private fun navigateToReaderFragment(file: File) {
     if (!file.canRead()) {
       activity.toast(string.unable_to_read_zim_file)
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/webserver/KiwixServer.kt b/app/src/main/java/org/kiwix/kiwixmobile/webserver/KiwixServer.kt
index 749d21687..adaeff922 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/webserver/KiwixServer.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/webserver/KiwixServer.kt
@@ -43,7 +43,7 @@ class KiwixServer @Inject constructor(
     private val context: Context,
     private val zimReaderContainer: ZimReaderContainer
   ) {
-    @Suppress("NestedBlockDepth")
+    @Suppress("NestedBlockDepth", "InjectDispatcher")
     suspend fun createKiwixServer(selectedBooksPath: ArrayList<String>): KiwixServer =
       withContext(Dispatchers.IO) {
         val kiwixLibrary = Library()
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/webserver/wifi_hotspot/HotspotService.kt b/app/src/main/java/org/kiwix/kiwixmobile/webserver/wifi_hotspot/HotspotService.kt
index df6a145a2..68014cb46 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/webserver/wifi_hotspot/HotspotService.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/webserver/wifi_hotspot/HotspotService.kt
@@ -73,7 +73,7 @@ class HotspotService :
     super.onDestroy()
   }
 
-  @Suppress("NestedBlockDepth")
+  @Suppress("NestedBlockDepth", "InjectDispatcher")
   override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
     when (intent.action) {
       ACTION_START_SERVER -> {
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/zimManager/Fat32Checker.kt b/app/src/main/java/org/kiwix/kiwixmobile/zimManager/Fat32Checker.kt
index a0c9c5135..5966efc4b 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/zimManager/Fat32Checker.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/zimManager/Fat32Checker.kt
@@ -17,7 +17,6 @@
  */
 package org.kiwix.kiwixmobile.zimManager
 
-import android.annotation.SuppressLint
 import android.os.Build
 import android.os.FileObserver
 import io.reactivex.Flowable
@@ -34,7 +33,7 @@ import org.kiwix.kiwixmobile.zimManager.FileSystemCapability.CAN_WRITE_4GB
 import org.kiwix.kiwixmobile.zimManager.FileSystemCapability.INCONCLUSIVE
 import java.io.File
 
-@SuppressLint("CheckResult")
+@Suppress("IgnoredReturnValue")
 class Fat32Checker constructor(
   sharedPreferenceUtil: SharedPreferenceUtil,
   private val fileSystemCheckers: List<FileSystemChecker>
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/DeleteFiles.kt b/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/DeleteFiles.kt
index 817a745be..74a750e62 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/DeleteFiles.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/DeleteFiles.kt
@@ -45,6 +45,7 @@ data class DeleteFiles(private val booksOnDiskListItems: List<BookOnDisk>) :
 
   @Inject lateinit var zimReaderContainer: ZimReaderContainer
 
+  @Suppress("InjectDispatcher")
   override fun invokeWith(activity: AppCompatActivity) {
     (activity as BaseActivity).cachedComponent.inject(this)
 
diff --git a/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/OpenFileWithNavigation.kt b/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/OpenFileWithNavigation.kt
index 58731ac8c..574410fa4 100644
--- a/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/OpenFileWithNavigation.kt
+++ b/app/src/main/java/org/kiwix/kiwixmobile/zimManager/fileselectView/effects/OpenFileWithNavigation.kt
@@ -31,6 +31,7 @@ import org.kiwix.kiwixmobile.core.zim_manager.fileselect_view.adapter.BooksOnDis
 import org.kiwix.kiwixmobile.main.KiwixMainActivity
 import org.kiwix.kiwixmobile.nav.destination.library.LocalLibraryFragmentDirections.actionNavigationLibraryToNavigationReader
 
+@Suppress("InjectDispatcher")
 data class OpenFileWithNavigation(private val bookOnDisk: BooksOnDiskListItem.BookOnDisk) :
   SideEffect<Unit> {
   override fun invokeWith(activity: AppCompatActivity) {
diff --git a/core/src/main/java/eu/mhutti1/utils/storage/StorageDeviceUtils.kt b/core/src/main/java/eu/mhutti1/utils/storage/StorageDeviceUtils.kt
index bcbce257a..06666576b 100644
--- a/core/src/main/java/eu/mhutti1/utils/storage/StorageDeviceUtils.kt
+++ b/core/src/main/java/eu/mhutti1/utils/storage/StorageDeviceUtils.kt
@@ -22,6 +22,7 @@ import android.content.Context
 import android.content.ContextWrapper
 import android.os.Build
 import android.os.Environment
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
@@ -31,10 +32,12 @@ import java.io.RandomAccessFile
 
 object StorageDeviceUtils {
   @JvmStatic
-  suspend fun getWritableStorage(context: Context) =
-    withContext(Dispatchers.IO) {
-      validate(externalMediaFilesDirsDevices(context), true)
-    }
+  suspend fun getWritableStorage(
+    context: Context,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
+  ) = withContext(dispatcher) {
+    validate(externalMediaFilesDirsDevices(context), true)
+  }
 
   @JvmStatic
   fun getReadableStorage(context: Context): List<StorageDevice> {
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/StorageObserver.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/StorageObserver.kt
index f12ef0f09..6bcc99466 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/StorageObserver.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/StorageObserver.kt
@@ -22,6 +22,7 @@ import io.reactivex.Flowable
 import io.reactivex.Single
 import io.reactivex.functions.BiFunction
 import io.reactivex.schedulers.Schedulers
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -43,13 +44,14 @@ class StorageObserver @Inject constructor(
   private val libkiwixBookmarks: LibkiwixBookmarks
 ) {
   fun getBooksOnFileSystem(
-    scanningProgressListener: ScanningProgressListener
+    scanningProgressListener: ScanningProgressListener,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
   ): Flowable<List<BookOnDisk>> {
     return scanFiles(scanningProgressListener)
       .withLatestFrom(downloadRoomDao.downloads(), BiFunction(::toFilesThatAreNotDownloading))
       .flatMapSingle { files ->
         Single.create { emitter ->
-          CoroutineScope(Dispatchers.IO).launch {
+          CoroutineScope(dispatcher).launch {
             try {
               emitter.onSuccess(files.mapNotNull { convertToBookOnDisk(it) })
             } catch (ignore: Exception) {
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/dao/LibkiwixBookmarks.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/dao/LibkiwixBookmarks.kt
index c4613f28c..547288a1a 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/dao/LibkiwixBookmarks.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/dao/LibkiwixBookmarks.kt
@@ -26,6 +26,7 @@ import io.reactivex.BackpressureStrategy.LATEST
 import io.reactivex.Flowable
 import io.reactivex.schedulers.Schedulers
 import io.reactivex.subjects.BehaviorSubject
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -219,10 +220,13 @@ class LibkiwixBookmarks @Inject constructor(
     return libraryBooksList.any { it == bookId }
   }
 
-  fun deleteBookmarks(bookmarks: List<LibkiwixBookmarkItem>) {
+  fun deleteBookmarks(
+    bookmarks: List<LibkiwixBookmarkItem>,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
+  ) {
     bookmarks.map { library.removeBookmark(it.zimId, it.bookmarkUrl) }
       .also {
-        CoroutineScope(Dispatchers.IO).launch {
+        CoroutineScope(dispatcher).launch {
           writeBookMarksAndSaveLibraryToFile()
           updateFlowableBookmarkList()
         }
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NewBookDao.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NewBookDao.kt
index 3421dd7c2..495f20e19 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NewBookDao.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NewBookDao.kt
@@ -22,6 +22,7 @@ import io.objectbox.kotlin.inValues
 import io.objectbox.kotlin.query
 import io.objectbox.query.QueryBuilder
 import io.reactivex.rxjava3.core.Completable
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -55,10 +56,10 @@ class NewBookDao @Inject constructor(private val box: Box<BookOnDiskEntity>) {
           .toList()
           .toFlowable()
           .flatMap { booksList ->
-            completableFromCoroutine {
+            completableFromCoroutine(block = {
               removeBooksThatAreInTrashFolder(booksList)
               removeBooksThatDoNotExist(booksList.toMutableList())
-            }
+            })
               .andThen(io.reactivex.rxjava3.core.Flowable.just(booksList))
           }
       }
@@ -80,10 +81,13 @@ class NewBookDao @Inject constructor(private val box: Box<BookOnDiskEntity>) {
       }
       .map { it.map(::BookOnDisk) }
 
-  private fun completableFromCoroutine(block: suspend () -> Unit): Completable {
+  private fun completableFromCoroutine(
+    block: suspend () -> Unit,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
+  ): Completable {
     return Completable.defer {
       Completable.create { emitter ->
-        CoroutineScope(Dispatchers.IO).launch {
+        CoroutineScope(dispatcher).launch {
           try {
             block()
             emitter.onComplete()
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NotesRoomDao.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NotesRoomDao.kt
index 0eba0aaab..0df91e5f1 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NotesRoomDao.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/dao/NotesRoomDao.kt
@@ -23,6 +23,7 @@ import androidx.room.Insert
 import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import io.reactivex.Flowable
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -88,8 +89,11 @@ abstract class NotesRoomDao : PageDao {
    * the associated file should also be removed from storage,
    * as it is no longer needed.
    */
-  private fun removeNoteFileFromStorage(noteFilePath: String) {
-    CoroutineScope(Dispatchers.IO).launch {
+  private fun removeNoteFileFromStorage(
+    noteFilePath: String,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
+  ) {
+    CoroutineScope(dispatcher).launch {
       val noteFile = File(noteFilePath)
       if (noteFile.isFileExist()) {
         noteFile.deleteFile()
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/downloader/downloadManager/FetchDownloadNotificationManager.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/downloader/downloadManager/FetchDownloadNotificationManager.kt
index 866b996e7..6c64661ec 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/downloader/downloadManager/FetchDownloadNotificationManager.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/downloader/downloadManager/FetchDownloadNotificationManager.kt
@@ -58,6 +58,7 @@ import com.tonyodev.fetch2.R.drawable
 import com.tonyodev.fetch2.R.string
 import com.tonyodev.fetch2.Status
 import com.tonyodev.fetch2.util.DEFAULT_NOTIFICATION_TIMEOUT_AFTER_RESET
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -209,14 +210,19 @@ class FetchDownloadNotificationManager @Inject constructor(
     }
   }
 
-  fun showDownloadPauseNotification(fetch: Fetch, download: Download) {
-    CoroutineScope(Dispatchers.IO).launch {
+  fun showDownloadPauseNotification(
+    fetch: Fetch,
+    download: Download,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
+  ) {
+    CoroutineScope(dispatcher).launch {
       val notificationBuilder = getNotificationBuilder(download.id, download.id)
       val cancelNotification = getCancelNotification(fetch, download, notificationBuilder)
       downloadNotificationManager.notify(download.id, cancelNotification)
     }
   }
 
+  @Suppress("InjectDispatcher")
   fun getCancelNotification(
     fetch: Fetch,
     download: Download,
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/extensions/FileExtensions.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/extensions/FileExtensions.kt
index 203c83e00..5d100b33c 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/extensions/FileExtensions.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/extensions/FileExtensions.kt
@@ -18,16 +18,22 @@
 
 package org.kiwix.kiwixmobile.core.extensions
 
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import java.io.File
 
-suspend fun File.isFileExist(): Boolean = withContext(Dispatchers.IO) { exists() }
+suspend fun File.isFileExist(dispatcher: CoroutineDispatcher = Dispatchers.IO): Boolean =
+  withContext(dispatcher) { exists() }
 
-suspend fun File.freeSpace(): Long = withContext(Dispatchers.IO) { freeSpace }
+suspend fun File.freeSpace(dispatcher: CoroutineDispatcher = Dispatchers.IO): Long =
+  withContext(dispatcher) { freeSpace }
 
-suspend fun File.totalSpace(): Long = withContext(Dispatchers.IO) { totalSpace }
+suspend fun File.totalSpace(dispatcher: CoroutineDispatcher = Dispatchers.IO): Long =
+  withContext(dispatcher) { totalSpace }
 
-suspend fun File.canReadFile(): Boolean = withContext(Dispatchers.IO) { canRead() }
+suspend fun File.canReadFile(dispatcher: CoroutineDispatcher = Dispatchers.IO): Boolean =
+  withContext(dispatcher) { canRead() }
 
-suspend fun File.deleteFile(): Boolean = withContext(Dispatchers.IO) { delete() }
+suspend fun File.deleteFile(dispatcher: CoroutineDispatcher = Dispatchers.IO): Boolean =
+  withContext(dispatcher) { delete() }
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.kt
index 3c988febe..0e287e387 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.kt
@@ -112,6 +112,7 @@ abstract class CoreMainActivity : BaseActivity(), WebViewProvider {
   @Inject
   lateinit var downloadMonitor: DownloadMonitor
 
+  @Suppress("InjectDispatcher")
   override fun onCreate(savedInstanceState: Bundle?) {
     setTheme(R.style.KiwixTheme)
     super.onCreate(savedInstanceState)
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreReaderFragment.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreReaderFragment.kt
index 10b98b57f..931c956bc 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreReaderFragment.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreReaderFragment.kt
@@ -1008,6 +1008,7 @@ abstract class CoreReaderFragment :
     loadUrlWithCurrentWebview(navigationHistoryListItem.pageUrl)
   }
 
+  @Suppress("InjectDispatcher")
   override fun clearHistory() {
     getCurrentWebView()?.clearHistory()
     CoroutineScope(Dispatchers.IO).launch {
@@ -2497,6 +2498,7 @@ abstract class CoreReaderFragment :
    *    openSearch("", isOpenedFromTabView = isInTabSwitcher, false)
    *  }
    */
+  @Suppress("InjectDispatcher")
   private fun saveTabStates(onComplete: () -> Unit = {}) {
     CoroutineScope(Dispatchers.Main).launch {
       savingTabsMutex.withLock {
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/page/viewmodel/effects/DeletePageItems.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/page/viewmodel/effects/DeletePageItems.kt
index 12dab8688..d39f878a2 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/page/viewmodel/effects/DeletePageItems.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/page/viewmodel/effects/DeletePageItems.kt
@@ -27,6 +27,7 @@ import org.kiwix.kiwixmobile.core.dao.PageDao
 import org.kiwix.kiwixmobile.core.page.adapter.Page
 import org.kiwix.kiwixmobile.core.page.viewmodel.PageState
 
+@Suppress("InjectDispatcher")
 data class DeletePageItems(
   private val state: PageState<*>,
   private val pageDao: PageDao,
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimFileReader.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimFileReader.kt
index fbc68a3b3..287f8f6b6 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimFileReader.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimFileReader.kt
@@ -25,6 +25,7 @@ import androidx.core.net.toUri
 import eu.mhutti1.utils.storage.KB
 import io.reactivex.Completable
 import io.reactivex.schedulers.Schedulers
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import org.kiwix.kiwixmobile.core.CoreApp
@@ -67,6 +68,7 @@ class ZimFileReader constructor(
     class Impl @Inject constructor(
       private val darkModeConfig: DarkModeConfig
     ) : Factory {
+      @Suppress("InjectDispatcher")
       override suspend fun create(zimReaderSource: ZimReaderSource): ZimFileReader? =
         withContext(Dispatchers.IO) { // Bug Fix #3805
           try {
@@ -192,12 +194,15 @@ class ZimFileReader constructor(
     }
 
   @Suppress("UnreachableCode")
-  suspend fun load(uri: String): InputStream? =
-    withContext(Dispatchers.IO) {
+  suspend fun load(
+    uri: String,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
+  ): InputStream? =
+    withContext(dispatcher) {
       val extension = uri.substringAfterLast(".")
       if (assetExtensions.any { it == extension }) {
         try {
-          return@withContext loadAsset(uri)
+          return@withContext loadAsset(uri, dispatcher)
         } catch (ioException: IOException) {
           Log.e(TAG, "failed to write video for $uri", ioException)
         }
@@ -273,8 +278,12 @@ class ZimFileReader constructor(
       throw IOException("Could not open pipe for $uri", ioException)
     }
 
-  private suspend fun loadAsset(uri: String): InputStream? =
-    withContext(Dispatchers.IO) {
+  @Suppress("InjectDispatcher")
+  private suspend fun loadAsset(
+    uri: String,
+    dispatcher: CoroutineDispatcher
+  ): InputStream? =
+    withContext(dispatcher) {
       val item =
         try {
           jniKiwixReader.getEntryByPath(uri.filePath).getItem(true)
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimReaderContainer.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimReaderContainer.kt
index 348100579..0d285a0ee 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimReaderContainer.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/reader/ZimReaderContainer.kt
@@ -34,6 +34,7 @@ class ZimReaderContainer @Inject constructor(private val zimFileReaderFactory: F
       field = value
     }
 
+  @Suppress("InjectDispatcher")
   suspend fun setZimReaderSource(zimReaderSource: ZimReaderSource?) {
     if (zimReaderSource == zimFileReader?.zimReaderSource) {
       return
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/search/SearchFragment.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/search/SearchFragment.kt
index b80d662e7..524454a43 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/search/SearchFragment.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/search/SearchFragment.kt
@@ -305,6 +305,7 @@ class SearchFragment : BaseFragment() {
       it.value.equals(query, ignoreCase = true)
     }
 
+  @Suppress("InjectDispatcher")
   suspend fun render(state: SearchState) {
     renderingJob?.apply {
       // cancel the children job. Since we are getting the result on IO thread
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/SearchResultGenerator.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/SearchResultGenerator.kt
index 9b58356be..5ec467f0b 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/SearchResultGenerator.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/SearchResultGenerator.kt
@@ -33,6 +33,7 @@ interface SearchResultGenerator {
 }
 
 class ZimSearchResultGenerator @Inject constructor() : SearchResultGenerator {
+  @Suppress("InjectDispatcher")
   override suspend fun generateSearchResults(searchTerm: String, zimFileReader: ZimFileReader?) =
     withContext(Dispatchers.IO) {
       if (searchTerm.isNotEmpty()) {
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/DeleteRecentSearch.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/DeleteRecentSearch.kt
index 83afdc5db..e27ed00c1 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/DeleteRecentSearch.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/DeleteRecentSearch.kt
@@ -26,6 +26,7 @@ import org.kiwix.kiwixmobile.core.base.SideEffect
 import org.kiwix.kiwixmobile.core.dao.RecentSearchRoomDao
 import org.kiwix.kiwixmobile.core.search.adapter.SearchListItem
 
+@Suppress("InjectDispatcher")
 data class DeleteRecentSearch(
   private val searchListItem: SearchListItem,
   private val recentSearchRoomDao: RecentSearchRoomDao,
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/SaveSearchToRecents.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/SaveSearchToRecents.kt
index f31903b98..3d26a5d08 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/SaveSearchToRecents.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/search/viewmodel/effects/SaveSearchToRecents.kt
@@ -27,6 +27,7 @@ import org.kiwix.kiwixmobile.core.dao.RecentSearchRoomDao
 import org.kiwix.kiwixmobile.core.reader.addContentPrefix
 import org.kiwix.kiwixmobile.core.search.adapter.SearchListItem
 
+@Suppress("InjectDispatcher")
 data class SaveSearchToRecents(
   private val recentSearchRoomDao: RecentSearchRoomDao,
   private val searchListItem: SearchListItem,
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt
index 64945417b..2c291c151 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt
@@ -32,6 +32,7 @@ import android.provider.DocumentsContract
 import android.provider.MediaStore
 import android.webkit.URLUtil
 import androidx.annotation.RequiresApi
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -65,8 +66,11 @@ object FileUtils {
 
   @JvmStatic
   @Synchronized
-  fun deleteCachedFiles(context: Context) {
-    CoroutineScope(Dispatchers.IO).launch {
+  fun deleteCachedFiles(
+    context: Context,
+    dispatcher: CoroutineDispatcher = Dispatchers.IO
+  ) {
+    CoroutineScope(dispatcher).launch {
       getFileCacheDir(context)?.deleteRecursively()
     }
   }
@@ -84,7 +88,8 @@ object FileUtils {
         fileloop@ while (alphabetFirst <= 'z') {
           var alphabetSecond = 'a'
           while (alphabetSecond <= 'z') {
-            val chunkPath = filePath.substring(0, filePath.length - 2) + alphabetFirst + alphabetSecond
+            val chunkPath =
+              filePath.substring(0, filePath.length - 2) + alphabetFirst + alphabetSecond
             val fileChunk = File(chunkPath)
             if (fileChunk.isFileExist()) {
               fileChunk.deleteFile()
diff --git a/custom/src/main/java/org/kiwix/kiwixmobile/custom/main/CustomFileValidator.kt b/custom/src/main/java/org/kiwix/kiwixmobile/custom/main/CustomFileValidator.kt
index 5bcac1079..46cb171ee 100644
--- a/custom/src/main/java/org/kiwix/kiwixmobile/custom/main/CustomFileValidator.kt
+++ b/custom/src/main/java/org/kiwix/kiwixmobile/custom/main/CustomFileValidator.kt
@@ -129,6 +129,7 @@ class CustomFileValidator @Inject constructor(private val context: Context) {
     }
   }
 
+  @Suppress("UseOrEmpty")
   private fun scanDirs(dirs: Array<out File?>?, extensionToMatch: String): List<File> =
     dirs?.filterNotNull()?.fold(listOf()) { acc, dir ->
       acc + dir.walk().filter { it.extension.startsWith(extensionToMatch) }.toList()