A powerful expression-based calculator, unit converter, and computation engine
About this app
Mather is a powerful, simple-to-use, no BS expression-based computation engine. In addition to basic calculator arithmetic, it supports all of the following. Powered by Math.js.
* Variables * User-defined functions * Easily-accessible math constants, e.g. 'pi' * Complex math expression evaluation * Trigonometric functions * Unit conversions (and more general unit arithmetic) * Complex numbers * Matrices * and more
Licensed under GPL-3.0-or-later.
What's New in v0.3.0
Imported from the F-Droid repository index.
Version history
Jan 6, 2017 · 1.8 MB · Android API 19–25 · code 300
Imported from the F-Droid repository index.
SHA-256 abd9f4a3a69368ebaf78c36649a33e0d6db60a425d26b07af82f9527a66c65c7
Sep 2, 2016 · 1.7 MB · Android API 19–23 · code 204
Imported from the F-Droid repository index.
SHA-256 4535975e97d721b7b1b425e7b47f216b58a4762f8d563729207420b827cbb7be
Aug 12, 2016 · 1.5 MB · Android API 19–23 · code 203
Imported from the F-Droid repository index.
SHA-256 515d54114b7fe330211b03bbeaaf6efac8ccd0e9d35d29a48e864cb6ec876685
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- 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 org.icasdri.mather 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, 0.2.4 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Mather 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 Mather, and a listing is removed when the evidence for it stops holding up.
Get Mather
Every source we list for org.icasdri.mather 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
abd9f4a3a69368ebaf78c36649a33e0d6db60a425d26b07af82f9527a66c65c7
Signing certificate
59021e6d65b2f27427046098f19bc893c712674d722df313634fae0ef237a11b
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.