iCalculator vs Parallel

iCalculator is a clean, on-device calculator that remembers your math. Every result can be saved to a searchable history with a name, note, tags, and an icon — so you always know how you got the number. Crunch the bill, the budget, the tip, or a project estimate, then keep the ones that matter. Do the math, name it, and find it later. Pin your most-used calculations to the top, filter by recent or high value, and search across names, notes, and tags in a tap. Pick from six color themes and make it yours. Best of all, the home screen widget is a full calculator. Tap the keypad, see the result, and save it — all without opening the app. Everything stays on your device. No account, no cloud, no tracking. Features: - Full calculator with live results and iOS-style percent - Save calculations to a searchable history - Name entries and add notes, tags, and custom icons - Pin favorites to the top for quick access - Filter by Recent, Pinned, High Value, or Tagged - Sort by date, value, or name - Six color themes: Midnight, Classic, Light, Graphite, Violet, Sunset - Adjustable decimal precision and thousands separator - Interactive home screen widget — calculate and save from your home screen - Medium, Large, and Extra Large widgets for iPhone and iPad - Haptic feedback - 100% on-device — no account, no cloud, no tracking

Parallel. Calculate more. DO MORE AT ONCE Why calculate one thing at a time? Run 2, 3, or 4 calculations side by side, and arrange them however you like with drag and drop. No more memorizing one result just to punch it into the next — it's all already on screen. That's the whole idea behind the name. ONLY WHAT YOU NEED No bloat, no clutter. Scientific mode covers exactly what you'd expect from a real scientific calculator — nothing more, nothing less. The converter covers 57 world currencies plus Bitcoin, Ethereum, and a handful of other crypto. Simple, on purpose. YOUR HISTORY, YOUR CALL Parallel only saves what you choose to keep — each calculation with your own note attached, kept separate for standard and scientific mode. Share any result straight from history, wherever you need it. Prefer to keep it private? Lock it all behind Face ID or your passcode. MADE TO FEEL RIGHT Swipe between calculator, scientific mode, and converter. Feel every tap with haptic feedback. Add a widget to your Home Screen, or pull it up instantly from Quick Menu. MAKE IT YOURS Free with the Classic theme. Unlock 10 named themes, a set of distinctive fonts, and the 4-screen layout with Parallel Pro — a one-time purchase, no subscription, ever. Your calculator has never looked this good. No ads. No data collected. Available in 34 languages.