A client for WaniKani, with advanced features built in and offline reviews!
About this app
Introducing Smouldering Durtles, your trusty companion app for the renowned WaniKani kanji learning platform, crafted by Tofugu! If you're on a quest to master Kanji with WaniKani, Smouldering Durtles is here to make your lessons and reviews engaging and enjoyable, with a plethora of features to enhance your learning experience.
Smouldering Durtles offers advanced searching capabilities, allowing you to quickly locate the exact Kanji or vocabulary you're looking for. Bolster your learning with self-study quizzes, testing your knowledge and helping you retain what you've learned. Customize your experience with a variety of themes to suit your personal style and make your study sessions visually appealing. Plus, never miss a review session with the convenience of offline reviews, ensuring your progress remains uninterrupted.
Please note that an active WaniKani account is essential to access this app's full potential.
Smouldering Durtles is an independent creation and is not officially supported or endorsed by Tofugu.
Licensed under Apache-2.0, by Jerry Cooke.
What's New in v1.2.7
Imported from the F-Droid repository index.
Version history
Jul 16, 2026 · 20.8 MB · Android API 21–35 · code 88
Imported from the F-Droid repository index.
SHA-256 ef6837c7a09b6efb0ce59c3b3bf903bbb961c2dc240ad3203763b8b31538ad61
Jul 15, 2026 · 20.8 MB · Android API 21–35 · code 85
Imported from the F-Droid repository index.
SHA-256 393a5cd071e9ffc5bac82b00f3a3c06dc67e46d835176e6aef847de3d70dcc12
May 11, 2025 · 20.8 MB · Android API 21–34 · code 84
Imported from the F-Droid repository index.
SHA-256 2380168cc41f290b905672c931ef5e6db497ee0b08075dea57c7b64ffa896598
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be com.smouldering_durtles.wk is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.2.4 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Smouldering Durtles first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Smouldering Durtles, and a listing is removed when the evidence for it stops holding up.
Get Smouldering Durtles
Every source we list for com.smouldering_durtles.wk is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
ef6837c7a09b6efb0ce59c3b3bf903bbb961c2dc240ad3203763b8b31538ad61
Signing certificate
b4ec768a30753a208261ee5bde4151ea656235026543c4d97aab82ce395cefd9
Permissions Required
What each permission lets Smouldering Durtles do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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