1RM Percentage Calculator
Jonathan McDill Health & Fitness iPhoneiPadiPod touch
1RM Percentage Calculator is a free Health & Fitness app for iPhone and iPad by Jonathan McDill. Rated 5.0/5 from 4 ratings. Requires iOS 15.1.
- Rating
- 5.0
- 4 ratings
- Price
- Free
- on the App Store
- Size
- 33 MB
- Age 4+
- Updated
- Jan 13
- 2026 · v2.0
Screenshots
About 1RM Percentage Calculator
1RM Percentage Calculator helps you set up and calculate your percentage based workouts. With custom percentages for ultimate control! Once you set up your percentages, easily view your calculated reps for each set in your workout. Use the integrated 1RM calculator to get an estimate of your one rep max. You can fully customize your plate weights and barbell. This utility allows you to easily set up your workouts without all the math! Main Features: - Percentage based workout sets calculator - Automatic plating algorithm - One rep max estimate calculator (Brzycki formula) - Customizable weights ** UNLOCKED Version Features ** - Unlimited sets - Keep track of reps for each set - Convenient scroller to move through your sets one at a time - Barbell plating helper with graphic - Themes
What’s new
Version 2.0 · Updated January 13, 2026
- All new design! - Ability to save and load workouts - Custom plate weight management - KG/LB selector - Themes for unlocked version - Bugfixes
App privacy
The developer, Jonathan McDill, 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:
- Purchases: Purchase History
Used for: Analytics, App Functionality
Alternatives to 1RM Percentage Calculator
Looking for apps like 1RM Percentage Calculator? Here are 6 similar apps on the App Store. The highest rated is 1RM Calculator (4.9/5), and all 6 are free to download.
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1RM - One Rep Max Calculator
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My 1 Rep Max
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1RM Calculator
4.9
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One Rep Max: 1RM Calculator
4.4
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PlateCalc Barbell Calculator
4.9
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1RM Max Calculator
4.2
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| 1RM Percentage Calculator | 5.0 / 5 (4 ratings) | Free | January 13, 2026 | |
| 1RM - One Rep Max Calculator | – | Free | Apr 13, 2024 | Compare |
| My 1 Rep Max | 4.4 / 5 (119) | Free | Oct 12, 2026 | Compare |
| 1RM Calculator | 4.9 / 5 (122) | Free | Oct 5, 2026 | Compare |
| One Rep Max: 1RM Calculator | 4.4 / 5 (185) | Free | Sep 29, 2026 | Compare |
| PlateCalc Barbell Calculator | 4.9 / 5 (21) | Free | Apr 9, 2026 | Compare |
| 1RM Max Calculator | 4.2 / 5 (22) | Free | May 18, 2026 | Compare |