Strength1RM
Estimate 1RM from weight, reps
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Strength 1RM is a focused one-rep max (1RM) calculator for strength training.
Enter your weight and reps to quickly estimate your 1RM and get practical training load guidance.
You can compare multiple proven formulas in one place, including Brzycki, Epley, O'Conner, Lombardi, and Mayhew.
Each method includes context on use cases and references to help you interpret results more confidently.
Great for:
Strength and hypertrophy training
Lifters who want safer load planning
Anyone tracking progress with evidence-based estimates
Key features:
Fast 1RM estimation (kg / lb)
Multi-formula comparison for transparency
Training suggestions based on your estimated 1RM
Easy result sharing
Disclaimer: This app provides training guidance only and is not medical advice. Train according to your readiness, recovery, and movement quality.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 卿 杨, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 卿 杨
- Size
- 4.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Delibra. All rights reserved.