Calculator M3
Clean, private calculator — no tracking, no ads, optional on-device AI.
新版本 1.5.2
- 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
- AI Math Solver: the Stop button stays on screen while solving in landscape
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
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
- 作者: Gergely Vagujhelyi
- 授權條款: GNU General Public License v3.0 only
- 問題追蹤系統
- 原始碼
- 建置詮釋資料
- 可重現建置狀態
版本
雖然在下方可選擇下載 APK 檔案，但要留意這樣的安裝方式將不會收到更新通知，是一種較不安全的下載方法。建議您先安裝 F-Droid 用戶端使用。
下載 F-Droid-
arm64-v8a此版本需要 Android 8.0 或更高的版本。
此套件包由原開發者建置和簽署，並保證與此原始碼 Tarball 保持一致。
-
arm64-v8a此版本需要 Android 8.0 或更高的版本。
此套件包由原開發者建置和簽署，並保證與此原始碼 Tarball 保持一致。
-
arm64-v8aarmeabi-v7ax86x86_64此版本需要 Android 8.0 或更高的版本。
此套件包由原開發者建置和簽署，並保證與此原始碼 Tarball 保持一致。
新版本 1.5.1
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
Your photos never leave your device — internet only downloads the model you pick.
- 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
Your photos never leave your device — internet only downloads the model you pick.
新版本 1.4.3
- Fix expression wrapping on Samsung devices (e.g. S25) after continuing from a large result