531 Strength

Keep focus on your lifts

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

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.

  • 4.9
    out of 5
    12K Ratings

Thank you for using 531 Strength! This update includes: - Redesigned Settings - Purchases come back automatically when you reinstall or change device - Improved error handling of iCloud backups - Improved CSV exports - Fixed minor issue with rounding - Requires iOS 18 or later 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

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Henrik Jachobsen
Size
27 MB
Category
Health & Fitness
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • iPad
    Requires iPadOS 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.
Languages
English
Age Rating
4+
In-App Purchases
Yes
  • Additional exercises $1.99
  • Progress log $6.99
  • Adjustable set $1.99
  • Plate calculator $1.99
Copyright
© 2026 Jachobsen