Calcatom

Smart Scientific Calculator & Live Currency Converter

Calcatom transforms your browser into a powerful, privacy-first calculator. No tracking, no accounts, no analytics. Just pure calculation power. ═══════════════════════════════════════════ 🧮 WHAT YOU GET Scientific Calculator • Trigonometry (sin, cos, tan, arcsin, arccos, arctan) • Logarithms (ln, log₁₀, eˣ, 10ˣ) • Powers and roots (x², x³, √, ∛, xʸ, ⁿ√x) • Parentheses for complex expressions • Constants (π, e) • Factorial, reciprocal, percentage • Angle mode toggle (DEG / RAD) • 2nd function key for extended operations 💱 Live Currency Converter • 150+ currencies including crypto (BTC) • Real-time exchange rates • Swap currencies instantly • Favorite currencies pinned to top • Search any currency by code or name • Works with private API keys for higher limits 🧮 BMI Calculator • Metric and imperial units • Color-coded categories (Underweight, Normal, Overweight, Obese) • Visual gauge display 💰 Tip Calculator • Split bills by number of people • Preset tips (15%, 18%, 20%) or custom • Real-time per-person calculation 📈 Percentage Calculator • Three modes: X% of Y, X is what % of Y, Increase/Decrease by X% ═══════════════════════════════════════════ ✨ FEATURES YOU'LL LOVE ⌨️ Keyboard Shortcuts Use your keyboard like a real calculator. Type numbers, operators, Enter for equals, Backspace to delete, Escape to clear. 🎨 Customizable Themes Choose from 5 beautiful themes. Dark mode, Light mode, Aqua, Sunset, iOS Dark, iOS Light. Premium themes unlock with one-time purchase. 📊 Calculation History Never lose track of your work. Full history with timestamps and date grouping. Free users save 20 entries, premium saves unlimited. 🔊 Sound & Haptic Feedback Tactile clicks with every button press. Adjustable in settings. Pitch varies by key for satisfying feedback. 🎯 Precision You Can Trust Powered by Decimal.js for exact floating-point math. No more 0.1 + 0.2 = 0.30000000000000004 errors. 🛡️ Privacy First • No tracking scripts • No analytics • No account required • All calculations stay in your browser ═══════════════════════════════════════════ 💎 UPGRADE TO PRO One-time payment of $4.99 unlocks: • 3 premium themes (Sunset, iOS Dark, iOS Light) • Unlimited calculation history ═══════════════════════════════════════════ 🔧 SUPPORT • GitHub Discussions for feature requests and community support • Email support included Install Calcatom once — calculate anywhere. ═══════════════════════════════════════════ Note: Currency Converter requires a free ExchangeRate-API key (1,500 requests/month). Add it in Settings → Currency API Key. No shared key = no tracking.