1RM Max Calculator is made and published by Kazumasa Shimomura. AppBrain is an independent app data site and isn't affiliated with Kazumasa Shimomura. The app name, icon, screenshots and description belong to Kazumasa Shimomura and are shown as published on the App Store.

About 1RM Max Calculator

1RM Max Calculator is a health & fitness app developed by Kazumasa Shimomura.

User Ratings

1RM Max Calculator is rated 4.23 out of 5 stars. The rating is based on 22 ratings.

App Information

1RM Max Calculator is freely available from the App Store. The app size is 10.38 MB. The latest version available is 3.5.0. The last update was on May 18, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since May 2016.

Description by Kazumasa Shimomura (from the App Store)

Accurate 1RM calculation using 7 scientific formulas

Calculate your maximum weight for bench press, squat, and deadlift instantly!
Using the average of 7 different proven formulas (Epley, Brzycki, Lander, and more) trusted by professional athletes to determine the most reliable 1RM.

[Why choose this app?]
- High-precision 1RM calculation using multiple formulas
- Simple and intuitive interface
- Comprehensive progress tracking
- Data visualization for growth monitoring

[Key Features]
- Support for 3 major lifts (bench press, squat, deadlift)
- 7 scientific calculation formulas for precise results
- Calendar function for daily record management
- Graph display for progress visualization
- One-tap data saving
- Full offline functionality

[Perfect for]
- Athletes wanting to track training effectiveness
- Lifters needing accurate 1RM calculations
- Anyone planning structured training programs
- Fitness enthusiasts tracking their progress

Make your training more scientific and effective.
Take your lifting to the next level!

Trusted by over 7,000 users worldwide.

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Screenshots

Screenshots by Kazumasa Shimomura, from the the App Store listing

Official page on the App Store

Alternatives to 1RM Max Calculator

Changelog of 1RM Max Calculator

No changelog data

Developer information for Kazumasa Shimomura

Kazumasa Shimomura

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App Store Rankings for 1RM Max Calculator

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Technologies used by 1RM Max Calculator

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1RM Max Calculator