# My 1 Rep Max — 1 Rep Max Calculator

> Calculate and log one rep max weights for strength training progress. (iPhone/iPad app by James T. Constant.)

- Source: https://appshunter.io/ios/app/my-1-rep-max/id1317637753 (this page in markdown: same URL + `.md`)
- Developer: [James T. Constant](https://appshunter.io/developer/1317637752)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Rating: 4.40/5 from 111 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, Hungarian
- Released: 2018-02-17
- Data updated: 2026-07-21
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/my-1-rep-max/id1317637753/reviews.md

## What is My 1 Rep Max?

My 1 Rep Max is a 1 Rep Max calculator and log book. Use any of the most popular 1 Rep Max formulas to estimate your 1 Rep Max weight and keep a log to see your progress over time.

Simply select a lift type, enter a weight, and a number of repetitions (up to 10), and tap the Calculate button to see your 1 Rep Max.

With My 1 Rep Max Premium, you can create your own custom lifts and use more than 10 repetitions to perform calculations.

A Note About Safety:
One rep maximum calculators are used to estimate the maximum amount you can lift. The degree of accuracy can vary significantly depending on your experience with weight training as well as your muscular composition. Most one rep maximum calculators are designed for experienced strength trainers so, if you are inexperienced, you may find your actual one rep maximum is much lower because your body is not accustomed to the stress of lifting heavy weight. Because it can be dangerous to attempt to lift your estimated maximum, always have a spotter with you. Seriously.

My 1 Rep Max will never ask you for a rating or review. However, if you'd like to take the time to rate or review it, you can do so from the Settings screen.

## Key features

- 1 Rep Max calculator
- Logbook for progress tracking
- Multiple popular formulas
- Custom lift creation (Premium)
- Extended repetition calculations (Premium)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| My 1 Rep Max Premium | $0.99 | one-time |


## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/my-1-rep-max/id1317637753/reviews.md

### 3/5 — This App Is Great!

*2026-03-02, version 2.1.12*

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!!!

### 4/5 — Could be perfect

*2026-01-16, version 2.1.12*

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.

### 3/5 — No longer working

*2024-11-06, version 2.1.7*

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.

### 1/5 — Buyer Beware

*2024-03-08, version 2.1.0*

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

### 1/5 — Can't exceed 10 reps

*2024-03-05, version 2.1.0*

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

### 1/5 — Crashing

*2022-09-29, version 2.0.6*

Every time I try to enter my max on a lift, the app crashes. EVERY TIME.

### 5/5 — 1 rep

*2022-09-18*

Simple solution to getting that base line of 1rep in the gym with % for work outs quality cheers

### 5/5 — Very accurate

*2022-03-07, version 2.0.4*

Accurate!

### 4/5 — Great, but needs more lifts

*2019-08-11, version 1.0.2*

Almost perfect...needs user-defined lifts! I would pay for that!

### 5/5 — More lifts needed

*2019-06-22, version 1.0.2*

The simplicity of the app is the reason for the use. The only thing that could be added would be additional lifts. I.e. snatch, power snatch, power clean, clean and jerk. More Olympic lifts!!

## Frequently asked questions about My 1 Rep Max

### 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.

## Version history (last 5 releases)

### 2.1.12 — 2024-12-06

Fixed a problem that prevented changing weight units.

### 2.1.11 — 2024-11-21

Minor UI updates.

### 2.1.10 — 2024-11-19

Fixed some UI issues in Settings.

### 2.1.9 — 2024-11-19

New enhancements to error tracking.

### 2.1.8 — 2024-11-14

Fixed a bug which caused the app to crash if the default lift was missing.

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## Related topics

[max rep calculator](https://appshunter.io/ios/topics/max-rep-calculator) · [rep calculator](https://appshunter.io/ios/topics/rep-calculator) · [1rm](https://appshunter.io/ios/topics/1rm) · [1rm calculator](https://appshunter.io/ios/topics/1rm-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-21.*