Calculator 42 with History PRO

Calculator 42 with History PRO is a free, feature-rich calculator that saves every calculation in a persistent history. Expressions and results can be edited, reused in new calculations, copied to other apps, and deleted from history with a long press. No ads and no forced subscriptions mean you get full access out of the box, with a clean dark/light theme toggle for comfortable use.

Beyond basic arithmetic, it supports percentages, parentheses with autocompletion, and an expression editor. Advanced functions include sin, cos, tan, arccos, arcsin, arctan, exponentiation, and logarithms with different bases. The app offers configurable history size and easy context-menu reuse from mini-history. Optional PRO features are billed via iTunes; privacy policy and terms of use are available in-app.