My 1 Rep Max

My 1 Rep Max

1 Rep Max Calculator

118 ratings
13 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • February 17, 2018
  • September 20, 2026
My 1 Rep Max screenshot #1 for iPhone
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My 1 Rep Max screenshot #5 for iPhone
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About

Estimate your one rep max weight for various lifts using popular formulas. Track your progress over time with a built-in logbook. Offers custom lift creation and extended repetition calculations with a premium upgrade.

✓1 Rep Max calculator
✓Logbook for progress tracking
✓Multiple popular formulas
✓Custom lift creation (Premium)
✓Extended repetition calculations (Premium)
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What's New in My 1 Rep Max

2.1.14

September 20, 2026

Updated for iOS 27.

1

Subscriptions & In-App Purchases

$0.99

My 1 Rep Max Premium

Add custom lifts and enter more than 10 reps

User reviews

This App Is Great!

I love this app but it is missing something? The android version of this app is much better! Wish it felt like the android version!!!

Could be perfect

The simplicity is the best thing about the app. The only critical feature missing is that when you save your reps, i wish you could click on a saved entry so that it gets loaded to the main screen. Why? I use this for several exercises. I have each of my reps saved. Every time I use it I need to recreate the reps rather than just work off my saved entries.
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No longer working

Updated all my apps and software on iPhone and this app is no longer working. Hundreds of data points that I cannot access. Would give 5 stars if this was fixed. About 2 weeks in waiting for response from App Store support.

Buyer Beware

Buyer beware, the premium version doesn’t allow you to add new lifts as promised.

Response from developer

Hi, I'm very sorry you experienced this problem. This was a bug that was fixed in version 2.1.5. I hope you'll give us another chance and try it again. Thanks!

Can't exceed 10 reps

Calculator won't go beyond 10 so pretty useless for high rep PRs

Response from developer

Thanks for the feedback. The premium version will allow you to enter up to 99 repetitions as well as create your own custom lifts. I hope you'll try it out!

FAQ

What does My 1 Rep Max do?

This app functions as a one rep max (1RM) calculator and a logbook. It helps you estimate the maximum weight you can lift for a single repetition based on your performance with lighter weights and multiple reps. You can also use it to record your lifts and monitor your strength gains over time.

How do I calculate my 1 Rep Max?

To calculate your 1 Rep Max, select the type of lift, enter the weight you lifted, and the number of repetitions you completed (up to 10 in the free version). Then, tap the 'Calculate' button to see your estimated 1 Rep Max weight.

Is there a cost to use My 1 Rep Max?

The core functionality of My 1 Rep Max, including the 1 Rep Max calculator and basic logging, is free to use. However, there is a premium version called My 1 Rep Max Premium which unlocks additional features like custom lift creation and the ability to use more than 10 repetitions for calculations.

What are the benefits of using a 1 Rep Max calculator?

A 1 Rep Max calculator helps you estimate your absolute strength potential for a given exercise. This information is valuable for setting training goals, designing effective workout programs, and tracking your progress in strength training. It allows you to quantify your strength improvements over time.

Can I track my progress with this app?

Yes, the app includes a logbook feature that allows you to keep a record of your lifts. By consistently logging your workouts, you can see how your estimated one rep max changes over time, providing a clear visual representation of your strength development.