Very easy to use RPN Calculator
About this app
Very handy calculator, in Reverse Polish Notation style. Written in Kotlin.
For every day use. Large digits with only the most used operators.
Licensed under GPL-3.0-only, by scoutant.
What's New in v1.3
Imported from the F-Droid repository index.
Version history
Jan 24, 2022 · 6.7 MB · Android API 28–31 · code 4
Imported from the F-Droid repository index.
SHA-256 7d32f8509d4f74dec70151dbf9adb4b549e9d56614dd9d9fb56ed808f36b5778
Apr 3, 2020 · 2.3 MB · Android API 24–29 · code 3
Imported from the F-Droid repository index.
SHA-256 ca78f8385f5e788f92b858c9f03619241bf4b5194775237f1e41985f2454445c
Jul 7, 2017 · 0.8 MB · Android API 23–25 · code 1
Imported from the F-Droid repository index.
SHA-256 6078f8b02411309941752d504f0c481498bdd363681c8605a6cdc84894d11d41
Will it run on your device?
55%
- Targets newer Android builds, so legacy devices may be excluded.
- 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.scoutant.rpn 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, 1.2 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall RPN 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 RPN, and a listing is removed when the evidence for it stops holding up.
Get RPN
Every source we list for org.scoutant.rpn 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
7d32f8509d4f74dec70151dbf9adb4b549e9d56614dd9d9fb56ed808f36b5778
Signing certificate
2dc56f71271d76cfad3147fab2b856353817617d2e8d31ec6b8f9a94e5740a5c
Permissions Required
What each permission lets RPN 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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