An open source, privacy focussed, 64kB aesthetic todo list app.
About this app
An open source, privacy focussed, 64kB aesthetic todo list app to quickly jot down things to do. Inspired by the system-24 theme and the Windows Mobile design system, this app's design is set to evolve into something even more eye-catching.
Features
- Simple note taking and list making: Includes an undo delete feature. - Retro terminalesque design: Inspired by Unix customizations found online. - Lightweight: Consumes only 0.05% CPU and 128KB of RAM. After all, simple apps shouldn't need more—remember, the Apollo mission operated on a computer with around 4KB of RAM! - Highly customizable: Offers many themes with option for custom fonts. - To add a new note tab: use the `///TabName` format. Bringing some Linux Terminal vibes. - To remove any tab (except the Main tab): use the `\\\TabName` format. - Or just long-press any tab to rename, delete or add new tab (has a shadow that kinda brings back MS-DOS vibes) - Support for custom fonts, so pick and select any .ttf files you like from your files system
Some upcoming features include - Turning your todo tab into a text editor tab - Export your notes tabs as just .txt files - Markdown support when in text editing mode - Optimized notes dragging - Input focus button at lower right of screen for increased accessibility
For more details on features, usage, customizations, discussions, visit the github repo. We have recently created a telegram group, discord server, subreddit and a youtube channel focussed on developing foss apps with optimized interfaces, so check out those links in the repo readme, and share your apps and games too. Github issues are still the fastest way to reach out.
Licensed under GPL-3.0-only, by ronynn.
What's New in v1.6
Imported from the F-Droid repository index.
- - Main tab can be deleted now without the need to rename it as long as one other tab exists
- - On import of json backup, if prexisting tabs no longer exist they are now created
- - No duplication of imported notes, useful in P2P syncing
- - Notes can now be dragged and moved over to other tabs
- - Tabs can now be moved left or right
- - Edge to edge support improvement as asked
Version history
Jul 10, 2026 · 0.1 MB · Android API 21–36 · code 6
Imported from the F-Droid repository index.
- - Main tab can be deleted now without the need to rename it as long as one other tab exists
- - On import of json backup, if prexisting tabs no longer exist they are now created
- - No duplication of imported notes, useful in P2P syncing
- - Notes can now be dragged and moved over to other tabs
- - Tabs can now be moved left or right
- - Edge to edge support improvement as asked
SHA-256 40d9f9ac1842898f4100ae7e63a63ff124a8182b28c989662b2894a95be0409e
May 20, 2026 · 0.1 MB · Android API 21–36 · code 5
Imported from the F-Droid repository index.
- - Long press tabs to rename or delete them, or add new tabs.
- - Double tap to delete toggle to prevent accidental note deletes
- - Copy button added beside each note
- - Themes organised better in a new design
- - Custom font can now be applied
- - Gesture flick to switch between home and settings
SHA-256 756f4466c8f572a55061bde8dd74d9fa30505e6e85310e9041a2e04b05cc4112
Mar 9, 2026 · 0.1 MB · Android API 21–36 · code 4
Imported from the F-Droid repository index.
- Notable Additions
- - Bunch of new themes, I like everforest-light the most.
- - Amoled support
SHA-256 9456f3a837c55d223ca1e48030dbcdf3f3bc726738153929c05688904c4b9d67
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 io.github.ronynn.karui 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, 1.5 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Karui ToDo 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 Karui ToDo, and a listing is removed when the evidence for it stops holding up.
Get Karui ToDo
Every source we list for io.github.ronynn.karui 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
40d9f9ac1842898f4100ae7e63a63ff124a8182b28c989662b2894a95be0409e
Signing certificate
131b3899e1160941018c6ad717faca2a608729013e85af4ae870273bdac1919a
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.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.