# 1RM Calculator vs My 1 Rep Max

1RM Calculator and My 1 Rep Max both sit at 4.5 stars, but that hides the real split: 57% of My 1 Rep Max's written reviews are positive against 37% of 1RM Calculator's. My 1 Rep Max also leads on update cadence (every 10 days vs every 3 weeks). 1RM Calculator's advantage is device support (3 vs 1) and iOS requirement (12.1 vs 18.6). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. 1RM Calculator sells 1 one-off in-app purchase and My 1 Rep Max sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for 1RM Calculator against 4.4 for My 1 Rep Max. Both are backed by a comparable volume of ratings — 222 and 119 respectively. Written reviews are what separate them: 37% of 1RM Calculator's written reviews are positive against 57% of My 1 Rep Max's.

1RM Calculator ships an update every 3 weeks, My 1 Rep Max every 10 days. The most recent releases landed on November 6, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | 1RM Calculator | My 1 Rep Max |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (222 ratings)](https://appshunter.io/ios/app/1rm-calculator-one-rep-max/id681279192/reviews)** | [4.4 (119 ratings)](https://appshunter.io/ios/app/my-1-rep-max/id1317637753/reviews) |
| Number of ratings | **222** | 119 |
| Positive reviews | 36.8% of reviews | **57.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 20 MB | 23 MB |
| Requires iOS | **12.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [David Bai](https://appshunter.io/developer/609405595) | [James T. Constant](https://appshunter.io/developer/1317637752) |

## What reviewers say

### 1RM Calculator

[App page](https://appshunter.io/ios/app/1rm-calculator-one-rep-max/id681279192)

Estimate your maximum weight lifted for a single repetition. Input your successful lifts and reps to gauge strength, compare progress, and plan future training. Offers advanced features for detailed tracking and analysis.

**Highlights:** Estimate 1-rep max, Track lift history and progress, Historical chart and list views, Multiple estimation formulas, Calculate multiple rep maxes, Switch between lbs and kgs, View percentages of 1-rep max

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $1.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Calculates 1 rep max quickly
- 💡 Helps figure out percentages
- 👍 Good for tracking routines
- 👍 Clean design

**What reviewers complain about**

- 🐛 Pro version not working
- 🐛 Paid features inaccessible
- 🐛 App crashes after upgrade
- 🐛 UI needs improvement
- 🐛 Missing features

**Reported bugs**

- Pro not working after purchase
- Paid upgrade not granting access
- App crashes after upgrade
- Feedback email link broken
- + button crashes app

**Requested features**

- Ability to re-arrange exercises
- Ability to re-name exercises
- Ability to delete exercises
- See all trend lines on one graph
- Track more than one set per day


### My 1 Rep Max

[App page](https://appshunter.io/ios/app/my-1-rep-max/id1317637753)

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.

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

**Features:** iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| My 1 Rep Max Premium | $7.99 | one-time |


## Frequently asked questions

### Is 1RM Calculator free?

1RM Calculator is free to download, with in-app purchases available.

### Is My 1 Rep Max free?

My 1 Rep Max is free to download, with in-app purchases available.

### Which has better reviews, 1RM Calculator or My 1 Rep Max?

1RM Calculator is rated higher. 1RM Calculator averages 4.5 out of 5 from 222 ratings, while My 1 Rep Max averages 4.4 from 119 ratings.

### Do 1RM Calculator or My 1 Rep Max have ads?

Neither 1RM Calculator nor My 1 Rep Max shows ads.

### Which is updated more often, 1RM Calculator or My 1 Rep Max?

1RM Calculator ships an update every 3 weeks, and My 1 Rep Max every 10 days. Most recently, 1RM Calculator was updated on November 6, 2026 and My 1 Rep Max on November 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*