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+.