Reikai 0.1.0

Jun 28, 2026

WARNING

Migrating from Yōkai-Y2K v1.9.7.5.9? Direct updates will cause the app to crash on startup. See below.

⚠️ Migration Notice (from Yōkai-Y2K)

If you are updating from Yōkai-Y2K v1.9.7.5.9 or earlier, do not install this over the old version — the app will crash on startup and won't open.

This happens because Reikai was rebuilt on a new foundation (Mihon), and the internal database structure changed. The old app had accumulated 40 database versions; the new one starts from 27. When they conflict, the app can't recover and refuses to launch.

A proper migration fix is in progress. Until then, use this workaround:

1. Back up your library from within the old app before doing anything else
2. Uninstall the old version
3. Install this release
4. Restore your backup

⚠️ Skipping the backup step will result in permanent data loss — uninstalling removes all local data.

Additions

• Read a merged manga straight through all its sources. Opening a merged series in the reader now flows through the whole group: the in-reader chapter list shows every source's chapters (each labeled with its source), and reaching the end of one source's chapters continues into the next without leaving the reader. Downloads and tracker updates follow each chapter's own source.
• Open Reikai's settings from Android's system settings. Reikai now appears as a configurable app in Android Settings; opening it there jumps straight to the in-app Settings screen. (Synced from Mihon.)
• Built-in adult content sources. Turn on Settings → Advanced → Enable adult sources to add them to Browse, then search with full filters (including tag autocomplete as you type), open an entry, and read it.
• Find saved entries by tag in your library. Library search now also matches the indexed tags of adult-source entries, so typing a tag name surfaces every saved entry carrying it.
• View an entry's full metadata. Adult-source entry details get an info action (overflow menu) that lists every captured field: tags, uploader, rating, size, page count, language, and dates, with long-press to copy. A dedicated settings screen lets you log in to the account-backed source and set image quality, titles, and tag thresholds; your choices are synced to your account automatically.
• More adult sources gain searchable tags. Installing additional adult-source extensions now records each entry's namespaced tags (artist, group, parody, character, and more) into your library, so library tag search and the info viewer work for them too.
• Keep favorited adult-source entries up to date. A background checker re-checks your favorited entries for newer versions and pulls them in, merging the new version's pages while keeping your read progress and bookmarks. Set how often it runs (and any Wi-Fi / charging limits) in its settings.
• Back up favorites to your account. Turn on Favorites backup in the source's settings, and favoriting an entry also adds it to your account's favorites, so your library can stay disposable while the account keeps a record. Removing an entry from your library leaves it on the account unless you tick "Also remove from favorites" in the confirmation. A "Back up all favorites now" button pushes everything already in your library.
• App backups now include adult-source tags. A backup of an adult-source entry now carries its captured tags, so restoring brings them straight back: library tag search and the info viewer work immediately, without re-opening each entry.
• Choose which source to migrate for a merged series. Migrating a manga or novel that's merged across several sources now opens a picker first, so you can move just the source(s) you want (the rest of the group stays put); an entry that isn't merged skips straight through as before.

Light novels

• First-class in your library. A Manga / Novels chip switches the library between the two; novels get the same grid, grouping, badges, multi-select, and Filter / Sort / Display sheet as manga, with their own categories.
• Browse and install novel sources. Add LNReader plugin repos from the Repos screen and browse novel sources in a catalogue styled like manga: Popular / Latest, filters, source settings, search, in-library badges, long-press to add, and pin favorite sources to the top.
• Global search across novel sources. One query searches every installed novel source at once, each filling in its own row; filter by Pinned / All / Has results, and tap a source to open its full results.
• A full novel details screen. Matches the manga layout, with chapter multi-select, a Filter / Sort / Display sheet, hideable chapters, Edit info, WebView / Share, and per-page loading for huge chapter lists. Saved novels open instantly from local storage and refresh on demand.
• A full-screen novel reader. LNReader-style typography with a live Display / Theme sheet (fonts, size, spacing, margins, light / sepia / mint / dark / black themes, plus custom brightness and a colour filter with blend modes, the same controls as the manga reader and kept separate from it), saved scroll position, a prefetched next chapter, and tap-to-hide immersive mode. The bottom bar carries chapter skip, a chapters list to jump around, a rotation toggle, and a WebView button that opens the current chapter on the source site; the top bar bookmarks the current chapter, and a progress seekbar tracks how far you've read.
• Read novels aloud (text-to-speech). A floating play button voices the chapter with your device's voices, highlighting and scrolling each paragraph as it goes. A new TTS settings tab picks the voice (filter the list by language), speed, pitch, and auto-advance to the next chapter; the button fades while playing and can be dragged anywhere. Playback keeps going when you leave the app or turn the screen off, with play / pause / stop on the lock screen, the notification, and headset buttons.
• More reader controls (General tab). The novel reader settings are reorganized into General / Display / TTS tabs, and the new General tab adds bionic reading (bold the start of each word), remove extra spacing, auto-scroll with a speed control, a vertical progress seekbar, tap the top / bottom edge to scroll, and swipe left / right between chapters.
• Offline downloads. Save chapter text with inline images, one at a time or in batches, on a single background queue that paces itself per source and resumes after a restart.
• Reorder and sort the novel download queue. Drag chapters to set the download order (it now survives a restart), or sort by upload date or chapter number. In the combined queue, sorting applies to manga and novels together.
• More novel download settings, matching manga. Under Settings → Downloads: delete a chapter when you mark it read (from the reader, the chapter list, or the library), keep only the last N read chapters downloaded, never delete bookmarked chapters, exclude categories from auto-delete, and download-ahead (auto-download the next few chapters as you read).
• Per-title novel update notifications. When favorited novels gain new chapters, you now get one notification per novel (grouped together) that opens that novel when tapped, instead of a single "N novels" line.
• Background updates in the Updates tab. Favorited novels re-check on a schedule (interval, device restrictions, category include / exclude, Smart update) and optionally auto-download; new chapters join a unified All / Manga / Novels Updates feed.
• Home-screen widget for manga and novel updates. A resizable widget shows your recently updated manga and novels together in labeled sections; tap a cover to open it. Add it from your launcher's widget picker (the manga-only Updates widget is still there too).
• Novels in the History tab. Reading a novel records it in History; the tab interleaves recently read manga and novels (All / Manga / Novels chip), newest first, with search, tap to resume, and delete or clear.
• Cross-source merge. Combine the same novel from several sources into one cover and one deduplicated chapter list with a source switcher and shared read state, by hand or automatically by title.
• Migrate novels to another source, one or many at once. From a novel's overflow menu, or by multi-selecting several novels in the library, each novel auto-searches your sources and suggests a match you can accept or change; picking carries read / bookmark / scroll-progress (matched by chapter number), categories, your custom cover, notes, and tracker links, and re-downloads any chapters you had saved offline. Choose Copy (keep the original too) or Migrate (replace it). Cover and notes options appear only when a selected novel actually has them. A source picker first lets you choose which sources to migrate to and drag them into priority order, so matches come from the sources you prefer. Each novel is then shown side by side with its match (covers, source, and chapter counts) so you can compare at a glance; tapping a cover opens that novel's details to read the description, and a match with fewer chapters than your current source is flagged in red. Changing a match lists the alternatives as browse-style rows grouped by source.
• Track novels on AniList, MyAnimeList, MangaUpdates, and Kitsu. A Tracking action on a novel binds it to any tracker you're already signed into, then set status, chapters read, score, and dates. Reading progress pushes automatically as you finish chapters (and queues to retry if you're offline).
• Plugins stay current. The Browse badge counts pending plugin updates, checked in the background, with one-tap reinstall and real plugin icons.
• Pull to refresh a novel's details. Swipe down on a novel's page to recheck its info and pick up new chapters.
• Incognito mode now covers novels. With Incognito on, reading a novel records no history, saves no progress (no resume position or read state), and skips tracker sync, and opening a novel source no longer updates Last Used, matching how manga behaves.
• Keep the screen on while reading a novel. A new switch in the novel reader's Display settings holds the screen awake, just like the manga reader.
• Lock the novel reader's orientation. Pick a per-novel orientation (Default, Portrait, Landscape, or a locked variant) from the reader's Display settings, with a global default under Settings → Reader, just like the manga reader. "Default" follows the global default.
• Novel downloads respect "Download only over Wi-Fi". With that setting on (Settings → Downloads), novel chapter downloads now wait for Wi-Fi instead of using mobile data, the same as manga.
• Failed novel downloads retry before giving up. A chapter download that hits a network blip or a momentarily busy source now retries a few times with a short backoff, instead of failing on the first stumble.
• Novels now appear in Statistics. An All / Manga / Novels switch on the Stats screen shows reading time, library size, chapters, and tracker stats for novels too, or both content types combined.
• Mark chapters read when you skip ahead (novels). Turn on "Mark chapter read when skipping ahead" for Novels (Settings → Reader) and tapping Next in the reader marks the chapter you skipped past as read, just like the manga reader.
• Per-novel notes. Keep a private markdown note on any saved novel from its details screen (overflow menu → Notes), using the same editor as manga. Saved with the novel and included in backups.

Library

• Cross-source merge for manga. A series from several sources shows as one cover with combined unread counts and one deduplicated chapter list behind a source switcher; merge by hand or automatically by title, with Manage sources and a Preferred sources ranking.
• Dynamic grouping. Group the library by source, tag, author, language, status, or tracking status instead of by category, with collapsible groups, in both views and for both manga and novels.
• Single-list view with a category hopper. An optional one-scroll view of collapsible categories with a floating jump-to hopper, plus per-category sort, refresh, and select-all.
• Pull down to update the whole library in single-list view. Swipe down from the top of the one-scroll category view to start a library update (the same as the overflow menu's Update library), for both manga and novels.
• "Downloaded only" mode now covers the novel library. Turn it on (More menu) and the novel library hides novels with no downloaded chapters, matching manga; the Filter sheet's Downloaded chip locks on while the mode is active.
• Category sort order and hidden categories. Order categories Off / A to Z / Z to A everywhere they appear, and hide a category without deleting it (it round-trips through backups, including Komikku).
• Delete categories with undo. Long-press to multi-select categories (Select all / Invert) and delete several at once, or delete one from its row; either way an Undo snackbar lets you take it back. Works on both the Manga and Novels category tabs.
• Library update-errors screen. Opt in under Settings → Advanced for an Update errors list of entries that failed their last update, grouped by reason.
• Panorama grid and source-icon badges. A comfortable grid that shows wide covers uncropped, and an optional source-icon badge on covers.
• Adult-content and category filters in the library filter sheet.
• Add to your library from global search. Long-press a result in global search to add it (with the category picker and possible-duplicate check) or remove it if it's already saved, the same as the per-source browse screen. Works for both manga and novels.

Manga details & recommendations

• Related-manga recommendations carousel. A Related row suggests similar titles (with in-library badges) from the source and, when enabled, from AniList, MyAnimeList, MangaUpdates, and Shikimori; tap to open or global-search, and a See all grid bulk-adds with category handling.
• A Recommendations settings screen (Settings → Library → Recommendations) toggles tracker recs per tracker, builds a taste profile from your tracker libraries, and offers style, serendipity, auto-refresh, and library / status filters (all off by default).
• Two-finger range selection on manga and novel chapter lists: press two rows to select everything between them.

Reader

• New options: resume reading position, pages to preload (default 4), and mark a chapter read when you skip ahead.
• A customizable bottom bar and an in-reader chapters list to jump to, bookmark, or download chapters without leaving the reader.
• Cover-color theming. Tint the reader and manga details with each manga's cover color (Settings → Appearance, on by default).

Networking

• Cloudflare bypass proxy support. Route a blocked source through a self-hosted bypass proxy instead of the in-app WebView (Settings → Advanced → Networking); the WebView solver stays the default and the fallback.

Backup & restore

• Your novel library is now backed up. A backup captures your favorited novels with their chapters, read state, categories, history, tracker links, and cross-source merges; restoring on a fresh install brings the whole novel library back. Restoring over an existing library keeps whichever copy is newer, so an older backup won't overwrite edits you've made since (matching how manga restore works). Older backups made before this still restore fine.
• Installed sources come back on restore. A backup now records which manga extensions and novel plugins you had installed, so a restore reinstalls them automatically; anything whose repo is missing is listed in the restore log so you know what to add back by hand.

Changes

• See whether an extension update is for manga or novels at a glance. On Browse → Extensions, the Manga and Novels chips now carry a count of their pending updates, so you can tell which side the update is on instead of just seeing one number on the tab.
• Adult-source entries show their source logo in your library. Saved entries from the built-in adult sources now use the source's mark as their badge, instead of a generic icon, matching the Browse source list.
• Hide a novel source you don't use. Long-press a source in Browse → Sources and Disable it: it dims in the list and drops out of global search, while staying installed and updating. Long-press again to re-enable.
• Add a novel to your library straight from History. A novel in the History tab that you haven't saved now shows an add-to-library button (like manga history rows); it favorites the novel and drops it in your default novel category, or asks.
• New novels can auto-land in a default category. Pick a default novel category under Settings → Library → Categories (next to the manga one); novels you add then go straight there instead of always asking, the same as manga.
• Filter a novel's chapters by downloaded. The novel chapter Filter sheet adds a Downloaded toggle (show only downloaded, or only not-downloaded) next to Unread and Bookmarked, the same as manga.
• See which novels failed to update. Turn on "Track novel update errors" (Settings → Advanced) and novels that fail an update are recorded; the Update errors screen gains All / Manga / Novels chips so both libraries share one list. Tracking is independent per type.
• Update just a category of novels, and refresh novels from the Novels library. A category's refresh button and pull-to-refresh on the Novels chip now update novels (they previously kicked off a manga update by mistake), and you can update a single novel category like manga.
• Track a novel privately. A tracked novel's Tracking sheet now has a "Track privately" toggle in the per-tracker menu (for trackers that support it, like Kitsu and AniList), keeping that entry off your public tracker profile, the same as manga.
• Adult-source settings have their own place in Settings. With adult sources enabled, the source's settings now appear as their own top-level Settings category (with its logo) between Security and Advanced, instead of being tucked inside Advanced. The "Enable adult sources" switch stays in Advanced, and the category hides again when you turn it off.
• The built-in adult sources show their logo. They now display their source mark in Browse instead of a blank placeholder icon.
• More adult-source settings. The settings screen adds Incognito mode (keeps that reading out of your history), Language filtering and Front-page categories (which sync to your account), and an updater-statistics view.
• Adult-source favorites backup is gentler and more reliable. Backing up a large library to your account now paces itself with a gradual backoff instead of a fixed delay, so it is less likely to trip the source's rate limits, and each favorite push retries a few times so a brief network hiccup no longer silently drops it.
• Adult-source entry details show their full tags from the library. Opening a saved adult-source entry from your library now expands the description and tag cloud by default, the same as when browsing the source. These entries have no description and their tags are the content, so they no longer hide behind a single sideways-scrolling row.
• Renamed the fork to Reikai. Installs upgrade in place (same package ID), and the launcher shows the new R-monogram icon and "Reikai" label.
• The library Display options sheet is now tab-aware, so a filter or category change made on the Novels tab no longer reaches into the manga library.
• Extensions no longer tied to a repository are labeled "Orphaned" instead of "Obsolete", with a clearer note that they won't receive updates.

Fixes

• Changing an adult source's update settings no longer crashes the app. On optimized (preview / release) builds, changing the update checker's "Automatic updates" schedule crashed the app; it now applies normally.
• Saved adult-source entries no longer get re-fetched on every library update. They are now skipped by the regular library update (their dedicated update checker still handles them), so updates finish faster and stop needlessly hammering those servers.
• No more duplicate built-in adult source if you also install its stock extension. With built-in adult sources enabled, the matching stock extension is now hidden and its sources skipped, so it can't shadow or double up the built-in one.
• The adult-source settings category shows up the moment you enable adult sources. Turning on Settings → Advanced → Enable adult sources now reveals (and turning it off hides) the category on the main Settings screen immediately, instead of only after leaving Settings and coming back.
• No more empty "Favorites backup" header in the adult-source settings. Its options all need an account login and were hidden when logged out, leaving just the header; the whole section now appears only once you are logged in.
• The restore screen opens reliably after you pick a backup file. Choosing a backup (Settings → Data and storage → Restore, or from onboarding) sometimes needed a second tap before the "what to restore" options appeared; it now shows on its own.
• Restoring a backup no longer lists your extensions twice. After a restore, each reinstalled extension could appear both as a normal (trusted) entry and as a phantom "untrusted" duplicate. The reinstall now runs cleanly and a trusted extension correctly clears any stale untrusted entry, so the list is right immediately (no app restart needed).
• Restoring a backup no longer drops random manga into the Default category. A timing issue let some manga restore before their categories existed, so they landed in Default; categories now finish restoring first, so every manga keeps its categories. (A long-standing Tachiyomi-lineage bug.)
• Manga merge groups now survive a restore to a fresh install. Merges were saved as internal ids that change on restore, so groups could come back wrong; they are now saved as stable source + URL references and rebuilt correctly, the same way novel merges already were.
• Migrating a merged manga or novel keeps the merge. Moving an entry that belongs to a multi-source merge group used to drop it out of the group (and on the manga side leave a stale reference to the old source); migration now puts the new source in the old one's place, so the series stays merged. Works whether you merged the sources by hand or they auto-grouped by title.
• A novel's "Download → Next 5/10/25" now advances through the book. It used to keep re-picking the first chapters (already downloaded) and queue nothing on repeat taps; it now skips downloaded chapters and continues to the next batch.
• The novel reader no longer crashes on a chapter with repeated paragraphs (blank lines, scene breaks, recurring phrases).
• Adding a light novel no longer creates a duplicate library entry when you add the same novel again.
• Novel plugins load and uninstall reliably. Installed plugins now load in parallel and retry on the next Browse/Library open instead of needing repeated cold restarts; installing no longer hangs, uninstalling fully removes a plugin (even one installed from more than one repo), and reinstalling from a new repo replaces the old one. The Browse → Extensions (Novels) tab shows a restored repo right away and, when a repo can't be reached, offers Retry instead of claiming you have no repos.
• Typing fast in the novel library search no longer scrambles or drops characters. The search box now updates instantly per keystroke (matching the manga library) instead of lagging behind a background refresh, so a quick query like "shadow" filters correctly instead of coming out as "haodws".
• Reading no longer fails with a random missing-image error. When a cached page had gone missing from disk, opening it could throw a FileNotFoundException; the reader now treats it as not cached and re-fetches. (Synced from Mihon.)

Other

• Novel library writes are now surgical. Favorite, cover, chapter-flag, and orientation changes update only the column they touch instead of rewriting the whole novel row, matching how the manga side works.
• Fixed a startup crash in optimized builds. Preview and release builds crashed on launch (a code-shrinker rule didn't cover the light-novel package); they now start normally.
• Reikai is now built on the Mihon base. The previous release was a fork of Yokai; this cycle rebases the app onto Mihon, so the core manga reader (library, details, reader, tracking, extensions, backups) is Mihon's, with Reikai's own features (light novels, cross-source merge, recommendations, and the library, reader, and theming additions above) rebuilt on top. This is why the core UI looks different; the .y2k package id is preserved so existing installs upgrade in place.
• Support for TachiyomiX 1.6 extensions (via the Mihon sync): the newer extension format installs and loads, existing extensions keep working, sources can attach hidden metadata carried through backups, and older backups still restore.
• Synced upstream changes from Mihon: Coil / OkHttp / Firebase updates, a SQLite driver build that avoids a rare database stall on a cancelled write, lifecycle-bound background tasks, and auto-following extension repositories that moved to the newer index format (now also reading gzip-compressed indexes and stores that keep their extension listing in a separate file).
• Faster app startup. Refreshed the bundled startup profiles (synced from Mihon) so common screens warm up sooner on first launch.
• Faster backup restore. Restoring a large library now batches its database writes in chunks, cutting restore time on big libraries; the speedup covers both manga and novels.
• More Mihon upstream sync: updated translations, refreshed app-shortcut icon colors, a Catppuccin theme tweak for clearer unread and downloaded badges, support for the newer tachiyomix extension metadata, and networking and dependency cleanup.
• Crash screen points to Reikai's bug tracker. If the app hits an unexpected error, the crash screen now suggests opening a GitHub issue (instead of Mihon's Discord), and the shared error/log files (crash, restore, library update) and the library CSV export are named for Reikai.

All changelogs · On GitHub