
531 Strength
Keep focus on your lifts
Free · In‑App Purchases · Designed for iPad
Makes it quick and easy to get a full overview of all weights, reps and sets based off your 1RM when you’re following the 5/3/1 program.
- Save your current 1 RM for each of the four exercises
- View calculated weights for each step in the cycle
- Round the weight to match the plates you have available
This app is made for people who are familiar with the structure of the 5/3/1 program and who needs simple access to the calculated weights for each exercise.
Thank you for using 531 Strength!
This update includes:
- Minor UI improvements
If you enjoy the app, please support the further development of the app by making an in-app purchase.
The developer, Henrik Jachobsen, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Henrik Jachobsen
- Size
- 26.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Additional exercises $1.99
- Progress log $6.99
- Adjustable set $1.99
- Plate calculator $1.99
- Copyright
- © 2025 Jachobsen