diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/alternatives/domain/MigrateUseCase.kt b/app/src/main/kotlin/org/koitharu/kotatsu/alternatives/domain/MigrateUseCase.kt
index 503e9495e..2e9caf19d 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/alternatives/domain/MigrateUseCase.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/alternatives/domain/MigrateUseCase.kt
@@ -7,8 +7,8 @@ import org.koitharu.kotatsu.core.parser.MangaDataRepository
 import org.koitharu.kotatsu.core.parser.MangaRepository
 import org.koitharu.kotatsu.details.domain.ProgressUpdateUseCase
 import org.koitharu.kotatsu.history.data.HistoryEntity
-import org.koitharu.kotatsu.history.data.PROGRESS_NONE
 import org.koitharu.kotatsu.history.data.toMangaHistory
+import org.koitharu.kotatsu.list.domain.ReadingProgress.Companion.PROGRESS_NONE
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/details/domain/ProgressUpdateUseCase.kt b/app/src/main/kotlin/org/koitharu/kotatsu/details/domain/ProgressUpdateUseCase.kt
index bdec62aae..32900a9fb 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/details/domain/ProgressUpdateUseCase.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/details/domain/ProgressUpdateUseCase.kt
@@ -5,7 +5,7 @@ import org.koitharu.kotatsu.core.model.findChapter
 import org.koitharu.kotatsu.core.model.isLocal
 import org.koitharu.kotatsu.core.os.NetworkState
 import org.koitharu.kotatsu.core.parser.MangaRepository
-import org.koitharu.kotatsu.history.data.PROGRESS_NONE
+import org.koitharu.kotatsu.list.domain.ReadingProgress.Companion.PROGRESS_NONE
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
 import org.koitharu.kotatsu.parsers.model.Manga
 import javax.inject.Inject
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/download/domain/DownloadState.kt b/app/src/main/kotlin/org/koitharu/kotatsu/download/domain/DownloadState.kt
index 6f392ee50..ead3cf486 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/download/domain/DownloadState.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/download/domain/DownloadState.kt
@@ -1,7 +1,7 @@
 package org.koitharu.kotatsu.download.domain
 
 import androidx.work.Data
-import org.koitharu.kotatsu.history.data.PROGRESS_NONE
+import org.koitharu.kotatsu.list.domain.ReadingProgress.Companion.PROGRESS_NONE
 import org.koitharu.kotatsu.local.domain.model.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
 import java.time.Instant
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/history/data/HistoryRepository.kt b/app/src/main/kotlin/org/koitharu/kotatsu/history/data/HistoryRepository.kt
index 8ab73a816..73808775a 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/history/data/HistoryRepository.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/history/data/HistoryRepository.kt
@@ -33,8 +33,6 @@ import org.koitharu.kotatsu.tracker.domain.CheckNewChaptersUseCase
 import javax.inject.Inject
 import javax.inject.Provider
 
-const val PROGRESS_NONE = -1f
-
 @Reusable
 class HistoryRepository @Inject constructor(
 	private val db: MangaDatabase,
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressDrawable.kt b/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressDrawable.kt
index 13e5f0da6..48a9f5e76 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressDrawable.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressDrawable.kt
@@ -13,7 +13,8 @@ import androidx.appcompat.content.res.AppCompatResources
 import androidx.core.graphics.ColorUtils
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.core.util.ext.scale
-import org.koitharu.kotatsu.history.data.PROGRESS_NONE
+import org.koitharu.kotatsu.list.domain.ReadingProgress
+import org.koitharu.kotatsu.list.domain.ReadingProgress.Companion.PROGRESS_NONE
 
 class ReadingProgressDrawable(
 	context: Context,
@@ -111,7 +112,7 @@ class ReadingProgressDrawable(
 			paint,
 		)
 		if (hasText) {
-			if (checkDrawable != null && percent >= 1f - Math.ulp(percent)) {
+			if (checkDrawable != null && ReadingProgress.isCompleted(percent)) {
 				tempRect.set(bounds)
 				tempRect.scale(0.6)
 				checkDrawable.bounds = tempRect
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressView.kt b/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressView.kt
index 1e19c9b93..1f9c0fe63 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressView.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/history/ui/util/ReadingProgressView.kt
@@ -17,8 +17,8 @@ import org.koitharu.kotatsu.core.prefs.ProgressIndicatorMode.NONE
 import org.koitharu.kotatsu.core.prefs.ProgressIndicatorMode.PERCENT_LEFT
 import org.koitharu.kotatsu.core.prefs.ProgressIndicatorMode.PERCENT_READ
 import org.koitharu.kotatsu.core.util.ext.getAnimationDuration
-import org.koitharu.kotatsu.history.data.PROGRESS_NONE
 import org.koitharu.kotatsu.list.domain.ReadingProgress
+import org.koitharu.kotatsu.list.domain.ReadingProgress.Companion.PROGRESS_NONE
 
 class ReadingProgressView @JvmOverloads constructor(
 	context: Context,
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/domain/ReadingProgress.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/domain/ReadingProgress.kt
index 4b6820225..e2c638512 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/domain/ReadingProgress.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/domain/ReadingProgress.kt
@@ -31,7 +31,17 @@ data class ReadingProgress(
 		CHAPTERS_LEFT -> totalChapters > 0 && percent in 0f..1f
 	}
 
-	fun isComplete() = percent >= 1f - Math.ulp(percent)
+	fun isCompleted() = Companion.isCompleted(percent)
 
 	fun isReversed() = mode == PERCENT_LEFT || mode == CHAPTERS_LEFT
+
+	companion object {
+
+		const val PROGRESS_NONE = -1f
+		const val PROGRESS_COMPLETED = 0.995f
+
+		fun isValid(percent: Float) = percent in 0f..1f
+
+		fun isCompleted(percent: Float) = percent >= PROGRESS_COMPLETED
+	}
 }
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewViewModel.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewViewModel.kt
index 45398c9da..062c1892e 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewViewModel.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewViewModel.kt
@@ -28,8 +28,8 @@ import org.koitharu.kotatsu.core.ui.BaseViewModel
 import org.koitharu.kotatsu.core.util.ext.require
 import org.koitharu.kotatsu.core.util.ext.sanitize
 import org.koitharu.kotatsu.history.data.HistoryRepository
-import org.koitharu.kotatsu.history.data.PROGRESS_NONE
 import org.koitharu.kotatsu.list.domain.MangaListMapper
+import org.koitharu.kotatsu.list.domain.ReadingProgress.Companion.PROGRESS_NONE
 import javax.inject.Inject
 
 @HiltViewModel
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderViewModel.kt b/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderViewModel.kt
index 759287ec9..ee651bc49 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderViewModel.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/ReaderViewModel.kt
@@ -52,8 +52,8 @@ import org.koitharu.kotatsu.details.data.MangaDetails
 import org.koitharu.kotatsu.details.domain.DetailsLoadUseCase
 import org.koitharu.kotatsu.details.ui.pager.ChaptersPagesSheet.Companion.TAB_PAGES
 import org.koitharu.kotatsu.history.data.HistoryRepository
-import org.koitharu.kotatsu.history.data.PROGRESS_NONE
 import org.koitharu.kotatsu.history.domain.HistoryUpdateUseCase
+import org.koitharu.kotatsu.list.domain.ReadingProgress.Companion.PROGRESS_NONE
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaPage
 import org.koitharu.kotatsu.parsers.util.assertNotNull