oneRM calculator(1RM)
Hanyu Seo Health & Fitness iPhoneiPadiPod touch
oneRM calculator(1RM) is a free Health & Fitness app for iPhone and iPad by Hanyu Seo. Requires iOS 18.0. Updated May 19, 2026.
- Price
- Free
- on the App Store
- Size
- 4 MB
- Age 4+
- Updated
- May 19
- 2026 · v1.1
Screenshots
About oneRM calculator(1RM)
You can estimate your 1RM based on the weight and reps you usually train with. In addition to the basic 1RM calculation based on the Brzycki formula, this calculator also supports more detailed and accurate 1RM estimates for squat, bench press, and deadlift using NSCA-based formulas. It also supports 1RM calculation for exercises that require bodyweight to be included, such as weighted pull-ups.
What’s new
Version 1.1 · Updated May 19, 2026
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App privacy
The developer, Hanyu Seo, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Crash Data, Performance Data, Other Diagnostic Data
Used for: Third-Party Advertising, App Functionality
Alternatives to oneRM calculator(1RM)
Looking for apps like oneRM calculator(1RM)? Here are 6 similar apps on the App Store. The highest rated is OneRM - Workout Logger (5.0/5), and all 6 are free to download.
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MaxRep: 1RM Calculator
-
OneRM - Workout Logger
5.0
-
RepGenie: Gym Calculator
-
GymCalc Max – 1RM
-
The Barbell Calculator
5.0
-
Tapas: Habit & Goal Tracker
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| oneRM calculator(1RM) | – | Free | May 19, 2026 | |
| MaxRep: 1RM Calculator | – | Free | Jun 8, 2026 | Compare |
| OneRM - Workout Logger | 5.0 / 5 (2) | Free | Apr 28, 2026 | Compare |
| RepGenie: Gym Calculator | – | Free | Jun 1, 2026 | Compare |
| GymCalc Max – 1RM | – | Free | Mar 10, 2026 | Compare |
| The Barbell Calculator | 5.0 / 5 (1) | Free | Sep 26, 2026 | Compare |
| Tapas: Habit & Goal Tracker | – | Free | Oct 10, 2026 | Compare |