531 Strength is a lifestyle app developed by Henrik Jachobsen for iPhone users. It is designed for individuals who are familiar with theprogram and need quick access to calculated weights for each exercise. The app saves your current 1RM (one-rep maximum) for each of the four exercises and displays the weights for each step in the cycle. Additionally, the app rounds the weight to match the plates you have available, making it easy to get a full overview of all weights, reps, and sets based off your 1RM.

The app's interface is simple and user-friendly, making it easy to navigate and use. With 531 Strength, you can easily track your progress and stay on track with your fitness goals. Overall, 531 Strength is a great tool for anyone who is serious about their fitness and wants to simplify theirprogram tracking.