# CalcPure — Ad-Free Scientific Calculator

> Ad-Free Scientific Calculator (iPhone/iPad app by Kohei Omori.)

- Source: https://appshunter.io/ios/app/calcpure/id6761338186 (this page in markdown: same URL + `.md`)
- Developer: [Kohei Omori](https://appshunter.io/developer/1886931034)
- Category: Utilities
- Price: $1.99
- Age rating: 4+
- Requires: iOS 15.1 · 23 MB
- Languages: American English
- Released: 2026-08-23
- Data updated: 2026-08-28
- User reviews in markdown: https://appshunter.io/ios/app/calcpure/id6761338186/reviews.md

## What is CalcPure?

CalcPure is a clean, fast, and completely ad-free calculator. Buy it once and get everything - no ads, no tracking, no subscriptions, no in-app purchases. Just pure calculation.

Everything is included:
- Basic calculator with +, -, x, /, %, and parentheses
- Scientific calculator (sin, cos, tan, log, ln, square root, x2, x^n, n!, pi, e, DEG/RAD)
- Programmer mode (BIN/OCT/DEC/HEX conversion, AND/OR/XOR/NOT/shift, 8-64 bit)
- Tip calculator & bill split (presets, custom %, round-up per person)
- Date calculator (days between dates, add or subtract days)
- Memory function (M+, M-, MR, MC)
- Calculation history (last 100 entries)
- Calculation tape sharing
- All 10 themes
- Dark mode (auto or manual)
- Haptic feedback
- Swipe to delete digits
- Real-time calculation preview
- State persistence (never lose your calculation)
- Lightning fast startup
- Optimized for iPad

One purchase unlocks the whole app, forever. There is no "pro tier", no locked buttons, and nothing to upgrade later.


## Version history (last 1 release)

### 1.0 — 2026-08-23

No release notes.

## More apps by Kohei Omori

- [TriAla - Flight Boarding Alarm](https://appshunter.io/ios/app/triala-flight-boarding-alarm/id6760937545)
- [FlipProfit](https://appshunter.io/ios/app/flipprofit/id6761647575)
- [FrameSmoother](https://appshunter.io/ios/app/framesmoother/id6768623085)
- [3 Words Today](https://appshunter.io/ios/app/3-words-today/id6769942566)
- [AI Engineer Quiz](https://appshunter.io/ios/app/ai-engineer-quiz/id6770689652)

All apps by Kohei Omori: https://appshunter.io/developer/1886931034

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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 2026-08-28.*