1RM Percentage Calculator
Percentage-Based Workout Util
Only for iPhone
Free · In‑App Purchases · Designed for iPhone
iPhone
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
Ratings & Reviews
- All new design!
- Ability to save and load workouts
- Custom plate weight management
- KG/LB selector
- Themes for unlocked version
- Bugfixes
The developer, Jonathan McDill, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jonathan McDill
- Size
- 35.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 1RM & Sets Calculator $2.99
- Copyright
- © 2026 Jonathan McDill