Simple and open-source calculator for quick and easy calculations
About this app
Introducing Fossify Calculator – your versatile and efficient tool for all your calculation needs. Enjoy a stylish, modern design paired with powerful functionality, perfect for both simple calculations and more complex tasks.
📶 OFFLINE FUNCTIONALITY:
Fossify Calculator operates entirely offline without needing internet permissions. Use it anytime, anywhere, and experience enhanced privacy, security, and stability.
🌐 MULTIPLE FUNCTIONS:
Whether you need to multiply, divide, or calculate roots and powers, Fossify Calculator has got you covered. It's designed for everyday calculations and more advanced operations, making it a reliable tool for a variety of mathematical needs.
📳 CUSTOMIZABLE SETTINGS:
Tailor your experience with customizable settings. Toggle vibrations on button presses, prevent your phone from sleeping while using the app, and adjust the interface to your liking.
🔒 PRIVACY AND SECURITY:
Your privacy is paramount. Fossify Calculator does not collect or share any user information with third parties. Use the app with peace of mind, knowing your data is secure.
📊 OPERATIONS HISTORY:
Access a history of your calculations for quick reference. Easily browse through recent operations to review or continue your work.
🎨 PERSONALIZED EXPERIENCE:
Personalize your calculator with customizable colors. Adjust text and background colors to match your style and preferences, creating a visually appealing and easy-to-use interface.
🌐 OPEN-SOURCE TRANSPARENCY:
Fossify Calculator is fully open-source, offering transparency and security. Access the source code for audits, ensuring a trustworthy and reliable tool.
Experience a new level of efficiency and customization with Fossify Calculator. Download now and elevate your calculation experience.
Explore more Fossify apps: https://www.fossify.org
Open-Source Code: https://www.github.com/FossifyOrg
Join the community on Reddit: https://www.reddit.com/r/Fossify
Connect on Telegram: https://t.me/Fossify
Licensed under GPL-3.0-only, by Fossify.
What's New in v1.4.0
Imported from the F-Droid repository index.
- Added:
- • Added support for custom fonts
- Changed:
- • Updated translations
Version history
Feb 2, 2026 · 6.7 MB · Android API 26–36 · code 10
Imported from the F-Droid repository index.
- Added:
- • Added support for custom fonts
- Changed:
- • Updated translations
SHA-256 7c5443c22d6d62c67dfe80df33ea9161ff0fa440f92590bcb45d7008b57613ed
Dec 18, 2025 · 6.7 MB · Android API 26–36 · code 9
Imported from the F-Droid repository index.
- Added:
- • Energy unit converter
- • Pressure unit converter
- • Speed unit converter
- Changed:
- • Updated translations
SHA-256 42cdad7933094fcdaa1bf6d30f0220e05c78dedbb97d31e72e3b706bd8a6d40e
Nov 1, 2025 · 6.6 MB · Android API 26–36 · code 8
Imported from the F-Droid repository index.
- Changed:
- • Compatibility updates for Android 15 & 16
- • Updated translations
SHA-256 cbadb649a3622867a62cb7756968db1e67e4a9e20df20b4b2732c998549bcbb6
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 org.fossify.math 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, 1.3.0 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Fossify Calculator Beta 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 Fossify Calculator Beta, and a listing is removed when the evidence for it stops holding up.
Get Fossify Calculator Beta
Every source we list for org.fossify.math 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
7c5443c22d6d62c67dfe80df33ea9161ff0fa440f92590bcb45d7008b57613ed
Signing certificate
affdb124d3f4720c2f98dbca9eacba0514fba4306e20a2786c861c3c0d6ff292
Permissions Required
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.