CalcPure

CalcPure is a clean, fast, and completely ad-free calculator. Buy it once and get everything - no ads, no tracking, no subscriptions, no in-app purchases. Just pure calculation. Everything is included: - Basic calculator with +, -, x, /, %, and parentheses - Scientific calculator (sin, cos, tan, log, ln, square root, x2, x^n, n!, pi, e, DEG/RAD) - Programmer mode (BIN/OCT/DEC/HEX conversion, AND/OR/XOR/NOT/shift, 8-64 bit) - Tip calculator & bill split (presets, custom %, round-up per person) - Date calculator (days between dates, add or subtract days) - Memory function (M+, M-, MR, MC) - Calculation history (last 100 entries) - Calculation tape sharing - All 10 themes - Dark mode (auto or manual) - Haptic feedback - Swipe to delete digits - Real-time calculation preview - State persistence (never lose your calculation) - Lightning fast startup - Optimized for iPad One purchase unlocks the whole app, forever. There is no "pro tier", no locked buttons, and nothing to upgrade later.