diff --git a/app/src/main/java/eu/kanade/domain/chapter/interactor/SyncChaptersWithSource.kt b/app/src/main/java/eu/kanade/domain/chapter/interactor/SyncChaptersWithSource.kt
index abd13a8492..300794b4c1 100644
--- a/app/src/main/java/eu/kanade/domain/chapter/interactor/SyncChaptersWithSource.kt
+++ b/app/src/main/java/eu/kanade/domain/chapter/interactor/SyncChaptersWithSource.kt
@@ -163,7 +163,7 @@ class SyncChaptersWithSource(
         var updatedToAdd = newChapters.map { toAddItem ->
             var chapter = toAddItem.copy(dateFetch = nowMillis + itemCount--)
 
-            if (chapter.isRecognizedNumber.not() || chapter.chapterNumber !in deletedChapterNumbers) return@map chapter
+            if (!chapter.isRecognizedNumber || chapter.chapterNumber !in deletedChapterNumbers) return@map chapter
 
             chapter = chapter.copy(
                 read = chapter.chapterNumber in deletedReadChapterNumbers,
diff --git a/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionSources.kt b/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionSources.kt
index 280dfae04a..7c7a6a9199 100644
--- a/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionSources.kt
+++ b/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionSources.kt
@@ -23,7 +23,7 @@ class GetExtensionSources(
                     ExtensionSourceItem(
                         source = source,
                         enabled = source.isEnabled(),
-                        labelAsName = isMultiSource && isMultiLangSingleSource.not(),
+                        labelAsName = isMultiSource && !isMultiLangSingleSource,
                     )
                 }
         }
diff --git a/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionsByType.kt b/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionsByType.kt
index 4156a27c5f..dadbd35f67 100644
--- a/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionsByType.kt
+++ b/app/src/main/java/eu/kanade/domain/extension/interactor/GetExtensionsByType.kt
@@ -22,9 +22,9 @@ class GetExtensionsByType(
             extensionManager.availableExtensionsFlow,
         ) { _activeLanguages, _installed, _untrusted, _available ->
             val (updates, installed) = _installed
-                .filter { (showNsfwSources || it.isNsfw.not()) }
+                .filter { (showNsfwSources || !it.isNsfw) }
                 .sortedWith(
-                    compareBy<Extension.Installed> { it.isObsolete.not() }
+                    compareBy<Extension.Installed> { !it.isObsolete }
                         .thenBy(String.CASE_INSENSITIVE_ORDER) { it.name },
                 )
                 .partition { it.hasUpdate }
@@ -36,7 +36,7 @@ class GetExtensionsByType(
                 .filter { extension ->
                     _installed.none { it.pkgName == extension.pkgName } &&
                         _untrusted.none { it.pkgName == extension.pkgName } &&
-                        (showNsfwSources || extension.isNsfw.not())
+                        (showNsfwSources || !extension.isNsfw)
                 }
                 .flatMap { ext ->
                     if (ext.sources.isEmpty()) {
diff --git a/app/src/main/java/eu/kanade/domain/source/interactor/GetSourcesWithFavoriteCount.kt b/app/src/main/java/eu/kanade/domain/source/interactor/GetSourcesWithFavoriteCount.kt
index c37be75aad..0cf342cafb 100644
--- a/app/src/main/java/eu/kanade/domain/source/interactor/GetSourcesWithFavoriteCount.kt
+++ b/app/src/main/java/eu/kanade/domain/source/interactor/GetSourcesWithFavoriteCount.kt
@@ -34,15 +34,15 @@ class GetSourcesWithFavoriteCount(
             when (sorting) {
                 SetMigrateSorting.Mode.ALPHABETICAL -> {
                     when {
-                        a.first.isStub && b.first.isStub.not() -> -1
-                        b.first.isStub && a.first.isStub.not() -> 1
+                        a.first.isStub && !b.first.isStub -> -1
+                        b.first.isStub && !a.first.isStub -> 1
                         else -> a.first.name.lowercase().compareToWithCollator(b.first.name.lowercase())
                     }
                 }
                 SetMigrateSorting.Mode.TOTAL -> {
                     when {
-                        a.first.isStub && b.first.isStub.not() -> -1
-                        b.first.isStub && a.first.isStub.not() -> 1
+                        a.first.isStub && !b.first.isStub -> -1
+                        b.first.isStub && !a.first.isStub -> 1
                         else -> a.second.compareTo(b.second)
                     }
                 }
diff --git a/app/src/main/java/eu/kanade/domain/track/model/Track.kt b/app/src/main/java/eu/kanade/domain/track/model/Track.kt
index 332ddd8d51..3ce611bab3 100644
--- a/app/src/main/java/eu/kanade/domain/track/model/Track.kt
+++ b/app/src/main/java/eu/kanade/domain/track/model/Track.kt
@@ -29,7 +29,7 @@ fun Track.toDbTrack(): DbTrack = DbTrack.create(trackerId).also {
 }
 
 fun DbTrack.toDomainTrack(idRequired: Boolean = true): Track? {
-    val trackId = id ?: if (idRequired.not()) -1 else return null
+    val trackId = id ?: if (!idRequired) -1 else return null
     return Track(
         id = trackId,
         mangaId = manga_id,
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt
index 3e447f4abb..61d0be98eb 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadManager.kt
@@ -315,13 +315,13 @@ class DownloadManager(
         val capitalizationChanged = oldFolder.name.equals(newName, ignoreCase = true)
         if (capitalizationChanged) {
             val tempName = newName + Downloader.TMP_DIR_SUFFIX
-            if (oldFolder.renameTo(tempName).not()) {
+            if (!oldFolder.renameTo(tempName)) {
                 logcat(LogPriority.ERROR) { "Failed to rename source download folder: ${oldFolder.name}" }
                 return
             }
         }
 
-        if (oldFolder.renameTo(newName).not()) {
+        if (!oldFolder.renameTo(newName)) {
             logcat(LogPriority.ERROR) { "Failed to rename source download folder: ${oldFolder.name}" }
         }
     }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
index f6d8e064b2..469cc0765a 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
@@ -130,7 +130,7 @@ class DownloadProvider(
         val newChapterName = sanitizeChapterName(chapterName)
         return DiskUtil.buildValidFilename(
             when {
-                chapterScanlator.isNullOrBlank().not() -> "${chapterScanlator}_$newChapterName"
+                !chapterScanlator.isNullOrBlank() -> "${chapterScanlator}_$newChapterName"
                 else -> newChapterName
             },
         )
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/track/anilist/Anilist.kt b/app/src/main/java/eu/kanade/tachiyomi/data/track/anilist/Anilist.kt
index 93fd75a452..dc799dfe11 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/track/anilist/Anilist.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/track/anilist/Anilist.kt
@@ -185,7 +185,7 @@ class Anilist(id: Long) : BaseTracker(id, "AniList"), DeletableTracker {
 
             if (track.status != COMPLETED) {
                 val isRereading = track.status == REREADING
-                track.status = if (isRereading.not() && hasReadChapters) READING else track.status
+                track.status = if (!isRereading && hasReadChapters) READING else track.status
             }
 
             update(track)
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/track/myanimelist/MyAnimeList.kt b/app/src/main/java/eu/kanade/tachiyomi/data/track/myanimelist/MyAnimeList.kt
index 5d66b73d46..5f75b12e82 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/track/myanimelist/MyAnimeList.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/track/myanimelist/MyAnimeList.kt
@@ -104,7 +104,7 @@ class MyAnimeList(id: Long) : BaseTracker(id, "MyAnimeList"), DeletableTracker {
 
             if (track.status != COMPLETED) {
                 val isRereading = track.status == REREADING
-                track.status = if (isRereading.not() && hasReadChapters) READING else track.status
+                track.status = if (!isRereading && hasReadChapters) READING else track.status
             }
 
             update(track)
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/track/shikimori/Shikimori.kt b/app/src/main/java/eu/kanade/tachiyomi/data/track/shikimori/Shikimori.kt
index 8f70e03dd2..3036cc8a8d 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/track/shikimori/Shikimori.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/track/shikimori/Shikimori.kt
@@ -72,7 +72,7 @@ class Shikimori(id: Long) : BaseTracker(id, "Shikimori"), DeletableTracker {
 
             if (track.status != COMPLETED) {
                 val isRereading = track.status == REREADING
-                track.status = if (isRereading.not() && hasReadChapters) READING else track.status
+                track.status = if (!isRereading && hasReadChapters) READING else track.status
             }
 
             update(track)
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt
index 93ea9495be..5508d1acd6 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt
@@ -90,7 +90,7 @@ abstract class PagerViewer(val activity: ReaderActivity) : Viewer {
         pager.addOnPageChangeListener(
             object : ViewPager.SimpleOnPageChangeListener() {
                 override fun onPageSelected(position: Int) {
-                    if (activity.isScrollingThroughPages.not()) {
+                    if (!activity.isScrollingThroughPages) {
                         activity.hideMenu()
                     }
                     onPageChange(position)
diff --git a/core/src/main/java/eu/kanade/tachiyomi/network/interceptor/RateLimitInterceptor.kt b/core/src/main/java/eu/kanade/tachiyomi/network/interceptor/RateLimitInterceptor.kt
index c4727f8a9b..eab5ec302a 100644
--- a/core/src/main/java/eu/kanade/tachiyomi/network/interceptor/RateLimitInterceptor.kt
+++ b/core/src/main/java/eu/kanade/tachiyomi/network/interceptor/RateLimitInterceptor.kt
@@ -89,7 +89,7 @@ internal class RateLimitInterceptor(
                 while (requestQueue.size >= permits) { // queue is full, remove expired entries
                     val periodStart = SystemClock.elapsedRealtime() - rateLimitMillis
                     var hasRemovedExpired = false
-                    while (requestQueue.isEmpty().not() && requestQueue.first <= periodStart) {
+                    while (!requestQueue.isEmpty() && requestQueue.first <= periodStart) {
                         requestQueue.removeFirst()
                         hasRemovedExpired = true
                     }
diff --git a/domain/src/main/java/tachiyomi/domain/release/interactor/GetApplicationRelease.kt b/domain/src/main/java/tachiyomi/domain/release/interactor/GetApplicationRelease.kt
index bf966fa12d..380da7b1ee 100644
--- a/domain/src/main/java/tachiyomi/domain/release/interactor/GetApplicationRelease.kt
+++ b/domain/src/main/java/tachiyomi/domain/release/interactor/GetApplicationRelease.kt
@@ -20,7 +20,7 @@ class GetApplicationRelease(
         val now = Instant.now()
 
         // Limit checks to once every 3 days at most
-        if (arguments.forceCheck.not() && now.isBefore(
+        if (!arguments.forceCheck && now.isBefore(
                 Instant.ofEpochMilli(lastChecked.get()).plus(3, ChronoUnit.DAYS),
             )
         ) {
diff --git a/domain/src/main/java/tachiyomi/domain/source/model/StubSource.kt b/domain/src/main/java/tachiyomi/domain/source/model/StubSource.kt
index 544326a4cc..0fee2af183 100644
--- a/domain/src/main/java/tachiyomi/domain/source/model/StubSource.kt
+++ b/domain/src/main/java/tachiyomi/domain/source/model/StubSource.kt
@@ -22,7 +22,7 @@ class StubSource(
         throw SourceNotInstalledException()
 
     override fun toString(): String =
-        if (isInvalid.not()) "$name (${lang.uppercase()})" else id.toString()
+        if (!isInvalid) "$name (${lang.uppercase()})" else id.toString()
 
     companion object {
         fun from(source: Source): StubSource {