Simple and beautiful calculator for Android
About this app
A simple and beautiful calculator for Android
📖 Features * Lightweight (APK ~2MB) * No unnecessary permissions * Dark, Light, Amoled and Material You theme * Scientific mode * History * Portrait and landscape orientation * Quick Settings Tile * More...
Licensed under GPL-3.0-only, by Darkempire78.
What's New in v3.2.0
Imported from the F-Droid repository index.
Version history
Apr 17, 2025 · 2.2 MB · Android API 21–34 · code 53
Imported from the F-Droid repository index.
SHA-256 2642613868a8a80f0ce963a4863bc153e7281b97b3bbdf36ca92a99dded7134a
Jan 24, 2025 · 2.2 MB · Android API 21–34 · code 52
Imported from the F-Droid repository index.
SHA-256 e8a2305969e7bef86859b7203b4cd0699f39133350c40fea81a63768d5831471
Jan 22, 2025 · 2.2 MB · Android API 21–34 · code 50
Imported from the F-Droid repository index.
SHA-256 8938a34111fa5ae20e34ee9056f8e950be70b8350952905c9bdc71209cd70dc1
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 com.darkempire78.opencalculator 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, 3.1.4 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall OpenCalc 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 OpenCalc, and a listing is removed when the evidence for it stops holding up.
Get OpenCalc
Every source we list for com.darkempire78.opencalculator 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
2642613868a8a80f0ce963a4863bc153e7281b97b3bbdf36ca92a99dded7134a
Signing certificate
8c665588447d26aeb150e7f3fdc8417c0f44bfe30bc165dafd4c6176055dc54d
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.