Yokatta

F-Droid Open Source | Science & Education

7 Downloads 16 Views v0.0 7.2 MB 4.1+

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(7.2 MB)

Editor's Overview

Yokatta is a science & education application developed by F-Droid Open Source, packaged as a single Android APK of version 0.0 weighing in at 7.2 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 7.2 MB, so it installs quickly even on modest connections.
This build is signed by "F-Droid Open Source" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

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

Details

Version	v0.0
Size	7.2 MB
Developer	F-Droid Open Source
Category	Science & Education
Package	com.thesis.yokatta
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	7

Frequently Asked Questions

Is Yokatta free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Yokatta require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Yokatta safe to install?
We link to the exact APK published by F-Droid Open Source. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Yokatta?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install Yokatta

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded com.thesis.yokatta.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Yokatta» by F-Droid Open Source and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.