Mechanical Calculator

Mechanical Calculator is a free, educational Android calculator inspired by classic mechanical printing calculators. Every entry and result is recorded on a paper tape (history) like a receipt—great for checking work, learning, and sharing.

Highlights
- Paper tape (calculation memory): records your inputs, operations, and results.
- Mechanical “printing” feel: optional dot‑matrix style printing/animation.
- Export & share the tape: TXT, CSV, PNG/JPG, and PDF (generated locally).
- Landscape mode: tape and keypad side‑by‑side, with left/right keypad option.

Calculator functions
- Basic operations: +, -, ×, ÷, =
- % with classic calculator behavior
- +/- sign toggle
- ⌫ backspace for the current entry
- Clear: C clears the current entry; long‑press C to clear everything (option to keep the tape)

Personalization
- Decimal display: Auto / Fixed 1 / Fixed 2
- Tape font size (scale)
- Button color presets
- Optional sound effects (disabling sounds also disables the printing animation)

Privacy & offline
- No sign-in. Calculations and preferences stay on your device.
- Optional ads (Google AdMob) may use the internet and collect data to serve ads.
- You can disable ads in Settings.

Compatibility
- Android 8.0+.