Pro-Calc

A clean, fast scientific calculator that respects your privacy.
Calculator is a fully-featured scientific calculator for everyday arithmetic, trigonometry, logarithms, factorials, memory operations, and engineering notation — all with a single, uncluttered interface.
Key features
• Basic and scientific modes, switchable on the fly
• Trigonometric functions: sin, cos, tan — and their inverses and hyperbolic variants
• Natural logarithm (ln), common log (log10), and arbitrary base log
• Square root, cube root, and arbitrary powers (xʸ)
• Memory bank with store, recall, add, subtract, and clear
• DEG / RAD / GRAD angle modes
• Fixed, scientific, engineering, and thousands-separator notations
• Live result preview as you type
• Calculation history (the most recent 100 expressions)
• Light and dark themes that follow your system setting
• Tablet and landscape layouts, including a side-by-side history panel
Privacy
Calculator stores every setting, memory value, and history entry only on your device. The app does not collect, transmit, share, or sell any data. It has no internet permission, no analytics, no advertising, and no third-party SDKs. You can wipe everything you have stored with a single tap from the menu.
Why you can trust it
• No account required
• No network calls of any kind
• No permissions requested
• Open and auditable (see the in-app Privacy Policy)