Flashcards based language learning app
About this app
Yokatta© is an open-source flashcards based language learning app using spaced repetition. The algorithm is heavily influenced by SuperMemo's SM-2 and follows best practices using Android Architecture Components provided by Google.
App features:
* selectable themes
* randomize order of flashcard during review
* review animation for visual feedback
* "sligtly-off" toast when answer submitted is not quiet correct
* haptic feedback when submitting an empty answer
* recording pronunciation
* double press "back-button" to exit review
* auto focus input field
* display diagrams to show how many review items have been taken
* swipe gesture to delete/modify existing flashcards
* swipe gestures to easily delete/modify existing flashcards
* search a specific flashcard
* export flashcards to JSON
Open source repository: https://github.com/uestueab/app-thesis
Licensed under GPL-3.0-only.
What's New in vv0.3.4
Imported from the F-Droid repository index.
Version history
Dec 16, 2021 · 7.2 MB · Android API 29–29 · code 4
Imported from the F-Droid repository index.
SHA-256 9fc042e18782f1f3761368f3cc6ed16dfe7de9ea36481e732c05c03488669e1e
Will it run on your device?
55%
- Targets newer Android builds, so legacy devices may be excluded.
- ABI coverage is focused on newer 64-bit devices.
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.thesis.yokatta 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
No earlier build is on record for Yokatta, so there is nothing to roll back to yet. When a second version is published, this section will explain how to move between them safely.
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 Yokatta, and a listing is removed when the evidence for it stops holding up.
Get Yokatta
Every source we list for com.thesis.yokatta 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
9fc042e18782f1f3761368f3cc6ed16dfe7de9ea36481e732c05c03488669e1e
Signing certificate
29ef08588b5b32b20cacca03405e3735649b9d1aea9384d84bd753fc5d26f232
Permissions Required
What each permission lets Yokatta do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
No earlier build is on record — this is the first release we have listed.
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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