Calc Pro - Simple and Useful is made and published by Keita Nonaka. AppBrain is an independent app data site and isn't affiliated with Keita Nonaka. The app name, icon, screenshots and description belong to Keita Nonaka and are shown as published on the App Store.

About Calc Pro - Simple and Useful

Calc Pro - Simple and Useful is an utilities app developed by Keita Nonaka.

User Ratings

Calc Pro - Simple and Useful is rated 4.83 out of 5 stars. The rating is based on 6 ratings.

App Information

Calc Pro - Simple and Useful is freely available from the App Store. The app size is 7.96 MB. The latest version available is 4.3.1. The last update was on November 28, 2025.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since November 2018.

Description by Keita Nonaka (from the App Store)

Calc Pro can do complicated calculations easily. It is a very powerful math calculator but easy to use. Calc Pro also handles huge numbers without ellipsis.
Most calculators will only handle calculations involving numbers with up to 13 digits, but this one allows for larger and more precise calculations, supporting up to 15 digits of precision to the right of the decimal, and big enough digits to the left.

Calculation history won't be lost when the app is closed.
You can reuse calculation equations and answers by tapping.

Calc Pro also supports mathematical functions like square root, logarithm, combinations, and permutation.
You can easily access these functions by swiping.

Features:
- Arithmetic
- Calculation with parentheses
- Dark Mode
- Huge Number Handling
- Copy calc answer with a long press
- Calculation history
- Scientific calculation
- Swipe to change the keyboard easily

Show more Show less

More data about Calc Pro - Simple and Useful

Price	Free
Rating	4.83 based on 6 ratings
Ranking	Not ranked
Version	4.3.1
App size	7.96 MB
Suitable for	Everyone

Screenshots

Screenshots by Keita Nonaka, from the the App Store listing

Official page on the App Store

Alternatives to Calc Pro - Simple and Useful

Changelog of Calc Pro - Simple and Useful

No changelog data

Developer information for Keita Nonaka

Keita Nonaka

Address:

Comments on Calc Pro - Simple and Useful for iOS

We don't have enough comments to show example comments. Please check back later.

App Store Rankings for Calc Pro - Simple and Useful

This app is not ranked

Technologies used by Calc Pro - Simple and Useful

Top new apps Price drops on Google Play Apps other people are watching Popular Utilities Apps Today's trending apps

AppBrain is an app data site, we track rankings, ratings, installs for all apps and games on Google Play and the App Store. AppBrain doesn't host app files or APKs, all install links go directly to the official store. All trademarks are owned by their respective owners. As an Amazon Associate AppBrain earns from qualifying purchases.

More apps

Calc Pro - Simple and Useful