calculator DUO vs Large Text Calculator

A scientific calculator with history, memory and a keypad made for one hand. Save useful answers and tap to use them again on iPhone and iPad. WITHIN THUMB REACH Move and resize the left- or right-hand keypad to suit your grip. KEEP THE ANSWERS YOU NEED Save useful results on a visual shelf. Tap to reuse them, recall your last answer, or search your calculation history and mark favorites. CORRECT INPUT WITH CONFIDENCE Swipe to delete a digit or function. The deleted content stays visible until your next input; tap the return button to undo the deletion. FROM EVERYDAY TO SCIENTIFIC Use arithmetic, percentages, powers, roots, logarithms and trigonometric functions. Long-press a result for a large display, with adjustable text, color, font and size. MAKE IT YOURS Five themes, optional digit grouping and an interface in 50 languages. No account is required. Expressions, saved results and calculation history are stored on your device. DATES AND TIME, TOO Find the time between two dates, add or subtract days and hours, and calculate across time zones. The free app may show banner ads. Remove Ads is an optional one-time purchase, with purchase restoration through the same Apple Account.

Large Text Calculator is a simple calculator with large, easy-to-read numbers and big buttons. Use it for everyday calculations such as checking prices, calculating percentages, or adding up expenses. Features: • Large, clear number display • Big buttons for easy tapping • Simple, uncluttered layout • Percentage calculations • Dark, high-contrast design • Haptic feedback on button press Useful for: • Anyone who finds small text hard to read • Seniors and older adults • Anyone looking for a simple, easy-to-read calculator No unnecessary complexity — just a practical calculator for everyday use.