Calculator⁷, previously called Resolve, is a free, ad-free calculator for iPhone. It shows results while you type and keeps a history of earlier calculations. If the built-in Calculator covers everything you need, there is no reason to switch; Calculator⁷ is useful when you want to revisit or revise an expression.
What to check in a free calculator app
A free price alone does not tell you how an app behaves. Check whether you can review past calculations, correct a number without starting over, and use the app without advertising. If you often copy a result into another app, check how the result can be copied.
Calculator⁷ offers calculation history, segmented expression input, live results, undo and delete controls. You can also change the theme color, key sounds and displayed decimal places. These are practical differences to evaluate against the calculator you already use.
A simple way to try it
Enter an everyday expression such as 24 × 3 + 18. Change the first number and check that the live result changes with it. Then open the history and confirm you can find the earlier calculation. This short test tells you more about whether the app fits your workflow than a generic “best calculator” ranking.
If you need a specific scientific or financial function, check that the app provides it before relying on it. No general-purpose calculator is the right choice for every task.
Ready to try it?
Calculator⁷ · Fast, ad-free calculator with history
Free on the App Store