# Key Calculator — A one - click calculation app

> A one - click calculation app (iPhone/iPad app by 瑞勤 李.)

- Source: https://appshunter.io/ios/app/key-calculator/id6740821637 (this page in markdown: same URL + `.md`)
- Developer: [瑞勤 李](https://appshunter.io/developer/1401713785)
- Category: Utilities, Finance
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 27 MB
- Languages: American English
- Released: 2025-01-27
- Data updated: 2026-05-14
- User reviews in markdown: https://appshunter.io/ios/app/key-calculator/id6740821637/reviews.md

## What is Key Calculator?

Revolutionary Tap-to-Calculate
Select an operator (+−×÷) first, then tap numbers to instantly calculate results. Saves 3 steps vs traditional calculators!

Customize Your Number Pad
Adjust max/min values, set step increments, and save frequent numbers. Build your dream keypad for faster inputs.

Undo Mistakes Instantly
Typed a wrong number? Undo your last action with one tap—no restart needed.

Calculation Time Machine
Auto-saves every step. Tap any history entry to resume calculations right where you left off.


## Version history (last 1 release)

### 1.0.0 — 2025-01-27

No release notes.

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## More apps by 瑞勤 李

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All apps by 瑞勤 李: https://appshunter.io/developer/1401713785

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-14.*