Clean, private calculator — no tracking, no ads, optional on-device AI.
About this app
Every calculation you make is your business — not Big Tech's. Calculator M3 is a beautifully designed calculator built with Material 3 that works entirely offline for everyday math, with zero data collection, zero analytics, and zero tracking.
Unlike other calculators, this app doesn't phone home. No usage tracking, no telemetry, no ad frameworks buried in the code. It does math — and an optional, fully on-device AI math solver — and nothing else.
✓ Full expression evaluation ✓ Live result preview ✓ Scientific functions ✓ Calculation history ✓ Material 3 dynamic theming ✓ Works offline (with an optional on-device AI math solver)
🔢 FULL EXPRESSION EVALUATION
Type complete mathematical expressions with proper operator precedence (PEMDAS) and parentheses up to 20 levels deep. See the result update in real-time as you type.
- Full PEMDAS operator precedence - Parentheses with 20 levels of nesting - Live result preview as you type - Tap anywhere in the expression to edit - High-precision BigDecimal arithmetic - Engineering notation for large numbers
🔬 SCIENTIFIC FUNCTIONS
- Square root (√) - Pi (π) constant - Power (^) exponentiation - Factorial (!) for values 0-99 - Percent (%) with consumer-style support - Implicit multiplication (2π, 3√2, etc.)
📜 CALCULATION HISTORY
- Stores up to 100 recent calculations - Persists across app restarts - Tap entries to reload them - Clear history when needed
📷 AI MATH SOLVER (OPTIONAL, EXPERIMENTAL)
An experimental extra for higher-RAM devices: photograph a handwritten math expression and let an on-device AI model read and solve it — entirely on your device, with nothing sent to any server.
➡️ HOW TO TURN IT ON: the AI features are hidden until you unlock them. In the calculator, tap the "AC" (all-clear) button 7 times in quick succession — a countdown guides the final taps. A camera icon then appears in the top-left corner, and the unlock is remembered.
- Needs a 6 GB+ device and a one-time vision-model download (2.6–4.9 GB) - Take a photo with your system camera, or pick one from your gallery - Choose from several open vision models (Gemma 4, Gemma 3n) - Models run fully on-device, GPU-accelerated where supported - The solution is shown with cleanly formatted math — fractions, roots, and exponents - Internet is used only once, to download the model you choose - No photo, calculation, or usage data ever leaves your device
🎨 MATERIAL 3 DESIGN
- Material You dynamic colors (Android 12+) - Automatic light and dark mode - Smooth button press animations - Haptic feedback - Adaptive layout for portrait, landscape, and foldable devices - Auto-sizing display for long expressions
🛡️ PRIVACY & OPEN SOURCE
- 100% open source (GPL v3) - No tracking, analytics, or ads - No data collection of any kind - The calculator itself needs no network at all - Internet is used only if you opt in to download an AI model — never to send your data - Your calculations and photos stay on your device, period
📱 WORKS ON ALL DEVICES
- Phones in portrait and landscape - Foldable devices (Pixel Fold, Galaxy Z Fold) - Tablets - Responsive button sizing and layout
Licensed under GPL-3.0-only, by Gergely Vagujhelyi.
What's New in v1.5.2
Imported from the F-Droid repository index.
- - AI Math Solver: your scan and result are now kept when you rotate the screen
- - AI Math Solver: the Stop button stays on screen while solving in landscape
Version history
Jul 1, 2026 · 12.8 MB · Android API 26–35 · code 13
Imported from the F-Droid repository index.
- - AI Math Solver: your scan and result are now kept when you rotate the screen
- - AI Math Solver: the Stop button stays on screen while solving in landscape
SHA-256 b224f071f7d34f7682ff048ce469f1fc196a4a005143e763875e27690bd9d955
Jun 27, 2026 · 12.8 MB · Android API 26–35 · code 12
Imported from the F-Droid repository index.
- New: AI Math Solver (experimental) — photograph handwritten math and solve it, fully on-device.
- - Hidden until you reveal it: tap AC 7 times quickly
- - Runs offline on Google LiteRT-LM, GPU-accelerated
- - Snap a photo or pick one from your gallery
- - Several Gemma vision models; background downloads resume if interrupted and can be stopped
- - Gated models unlock with a one-tap Hugging Face sign-in
SHA-256 e7329ac3d18adef1a8d1521047b27f571a74b1405f17dfbaba326cc3427b4646
Mar 26, 2026 · 1.3 MB · Android API 26–35 · code 10
Imported from the F-Droid repository index.
- - Fix expression wrapping on Samsung devices (e.g. S25) after continuing from a large result
SHA-256 48c187eaed9d83d23e0fd9d41a34b02e0e8758a42afde08edc5b970e91936607
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- 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.vagujhelyigergely.calculatorm3 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, 1.5.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Calculator M3 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 Calculator M3, and a listing is removed when the evidence for it stops holding up.
Get Calculator M3
Every source we list for com.vagujhelyigergely.calculatorm3 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
b224f071f7d34f7682ff048ce469f1fc196a4a005143e763875e27690bd9d955
Signing certificate
49646ed216aa6e8f23326999052f6704b6e9228be310b56b6e8b3ab8113bae04
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.
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