Prism is the calculator that never interrupts. No ads. No subscriptions. No tracking. Just fast, precise math in a design you will actually enjoy.
WHY PRISM
Most calculator apps interrupt you with full screen ads and lock basic features behind subscriptions. Prism does neither. Everything essential is free forever, and going Pro is a single one-time purchase.
FREE FOREVER
• Standard and scientific calculator
• Exact fraction math: 0.1 + 0.2 = 0.3, and fractions like 2 3/4
• Percent calculations that work the way you expect
• Full calculation history with search, notes, and one tap reuse
• Copy and paste that just works, even with currency symbols and formatted numbers
• Unit converter with length, weight, and temperature
• Three handy mini calculators
• Classic theme in light and dark
PRISM PRO: ONE PURCHASE, YOURS FOREVER
• All premium themes
• Currency converter with rates for 340+ currencies, works offline
• Every unit converter category
• All 7 mini calculators: Percentages, Tip & Split, Discount & Tax, Dates, Loan, Unit Price, BMI
• History CSV export
• Alternate app icons
BUILT RIGHT
• Precise decimal engine with no floating point surprises
• Works fully offline. Currency rates are cached, so the converter works on a plane
• Real iPad layout with a two panel landscape view, not a stretched phone app
• 12 languages, with right to left support
• Privacy first: no data collected, no analytics, no trackers. The only network request the app ever makes is downloading currency rates
https://prismcalculator.app/terms
https://prismcalculator.app/privacy
