# Calculacha - Simple Calculator

> Calculacha - Simple Calculator (iPhone/iPad app by Shinya Iwasaki.)

- Source: https://appshunter.io/ios/app/calculacha-simple-calculator/id1240738025 (this page in markdown: same URL + `.md`)
- Developer: [Shinya Iwasaki](https://appshunter.io/developer/1240738024)
- Category: Productivity, Business
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 23 MB
- Languages: Arabic, English, Indonesian, Japanese, Korean, Russian, Chinese, Chinese
- Released: 2017-05-30
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/calculacha-simple-calculator/id1240738025/reviews.md

## What is Calculacha?

: Get 25% discount of 10 dollars just by entering "10 - 25%"!
: Choose the theme that's right for you!
: Safely delete one character at a time!
: Both the input field and answers can hold up to 38 characters!
: Use the "000" button to enter a thousand with just two taps
: You can delete one character at a time by tapping the "C" key, and clear by long-pressing it
: Have fun with TTS in both English and Japanese!
: Enjoy using a calculator!
: You can purchase add-ons such as removing ads from the settings screen.

A calculator made by the dev of Tweecha, which reached #1 among Twitter apps.
Even though it is simple, Calculacha is unique and fast. Let's make using a calculator enjoyable!

Help & Feedback
For requests, bug reports, and inquiries, please contact us using the following:
http://sinproject.net/community/
We will strive to make Calculacha fun and easy for everyone.

How to calculate percentages

: To get +20% of $10: 10 + 20%
: To find the price of a $10 item with a 25% discount: 10 - 25%
: To get 40% of $30: 30 × 40%
: To find the retail price when an item is $3 under a 30% discount: 3 ÷ 30%


## Version history (last 1 release)

### 9.1.11 — 2018-02-14

This app has been updated by Apple to display the Apple Watch app icon.

: Speed up app launch

## Apps similar to Calculacha

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Grid ToDo - Plan 64 Actions](https://appshunter.io/ios/app/grid-todo-plan-64-actions/id1102066391) | 4.7 (10) | Free | Productivity |
| [Loan,Mortgage ,Tip Calculator](https://appshunter.io/ios/app/loanmortgage-tip-calculator/id445575722) | 3.8 (502) | Free | Productivity |
| [calcneu - Simple calculator](https://appshunter.io/ios/app/calcneu-simple-calculator/id1531493865) | 4.8 (5) | Free | Productivity |
| [Photo Calc - Simple Calculator](https://appshunter.io/ios/app/photo-calc-simple-calculator/id1130778812) | 3.5 (8) | Free | Productivity |
| [Diii Notify - hourly chime](https://appshunter.io/ios/app/diii-notify-hourly-chime/id1001398032) | 4.0 (142) | Free | Productivity |
| [Calculator Easy Lite](https://appshunter.io/ios/app/calculator-easy-lite/id1303437744) | 4.8 (127) | Free | Productivity |

## More apps by Shinya Iwasaki

- [Tweecha 2 for Twitter](https://appshunter.io/ios/app/tweecha-2-for-twitter/id1457534850)

All apps by Shinya Iwasaki: https://appshunter.io/developer/1240738024

---

*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 2026-06-10.*