The notes app built for handwriting
About this app
Saber is the notes app built for handwriting.
It's designed to be as simple and intuitive as possible, while still delivering unique features that you'll actually use. Additionally, Saber is available across all your devices, large and small, and syncs between them seamlessly.
Notably, it can invert your notes when you're in dark mode. This allows you to write with white ink on a black background, which is much easier on the eyes in low-light environments like when the teacher turns off the lights in class. Images and PDFs are also inverted, so you can still use a digital printout or a textbook without the fuss.
Saber uses a dual-password system to protect your notes from anyone but you, even if they have complete control over the server. You can safely store your notes on the official Saber server, another server, or even host your own!
The app is completely open-source so that anyone can view the source code and see exactly what it's doing and how it handles your data. Many other note-taking apps are closed-source and proprietary, meaning that their inner workings are a mystery to the public.
As someone who studies maths, highlighting multi-line equations was always a hassle with other apps, where the highlighter would change color when it overlapped with itself. Another problem I had was that in some apps, the highlighter would render on top of the text, fading it out and making it hard to read. Saber's highlighter has no such issues. It utilizes canvas compositing to render the highlighter in a way that is consistent with/better than traditional paper, where it handles overlaps and maintains color consistency.
Saber has everything you need to keep your notes organized. Create folders inside folders inside folders to your heart's content with no limit on the number of nested folders. And even though a note may be buried deep within a nested folder, you can still access it easily with your most recent notes always available on the home screen.
Discover a whole new way to capture and organize your thoughts with Saber. Whether you're a student, professional, or creative mind, Saber is your trusted companion for digital handwriting. Download now and let your ideas flow freely!
Licensed under GPL-3.0-only, by Adil Hanney.
What's New in v1.35.0
Imported from the F-Droid repository index.
- • The browse page is now sorted alphabetically by default. You can customize the sort with the button at the top.
- • Fixed a crash on certain Android devices.
- • Removed the scroll up to refresh functionality because it was confusing.
Version history
Jul 10, 2026 · 40.6 MB · Android API 24–36 · code 1350003
Imported from the F-Droid repository index.
- • The browse page is now sorted alphabetically by default. You can customize the sort with the button at the top.
- • Fixed a crash on certain Android devices.
- • Removed the scroll up to refresh functionality because it was confusing.
SHA-256 921e930ef3b49ff0691e20d79c38a607743785f3201343eaf6be035a72a8e893
Jul 10, 2026 · 39 MB · Android API 24–36 · code 1350002
Imported from the F-Droid repository index.
SHA-256 ba3f7929e91d6f1e786d01a95becd97cd6f85cb7b256893afe3e8ab7d9f9df2b
Jul 10, 2026 · 35.3 MB · Android API 24–36 · code 1350001
Imported from the F-Droid repository index.
SHA-256 ecaf8faa5f7faa257382468c5aeb9e8c7128195dc5d4ece24e84581160b528cc
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- 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.adilhanney.saber 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, 1.35.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Saber 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 Saber, and a listing is removed when the evidence for it stops holding up.
Get Saber
Every source we list for com.adilhanney.saber 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
921e930ef3b49ff0691e20d79c38a607743785f3201343eaf6be035a72a8e893
Signing certificate
07cbce38536206e629fecb4ef14fc66861ca0965556878ad6b636d77a6ab895a
Permissions Required
What each permission lets Saber 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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