# One Rep Max vs RM

The clearest difference is rating: One Rep Max at 4.4 against RM's 2.0. One Rep Max also leads on ratings volume (185 vs 1) and update cadence (every 6 days vs monthly). RM's advantage is review sentiment (100% vs 58%) and in-app purchases (none vs 3). On price and device support there is nothing between them.

Both are free to download. One Rep Max sells 3 in-app purchases, starting at $2.99 per month. RM asks for nothing beyond the download.

One Rep Max holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: One Rep Max has 185 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 58% of One Rep Max's written reviews are positive against 100% of RM's, so the app with the better star average is not the one people write more warmly about.

One Rep Max ships an update every 6 days, RM monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | One Rep Max | RM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (185 ratings)](https://appshunter.io/ios/app/one-rep-max-1rm-calculator/id950621710/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/rm-calculator/id1429516288/reviews) |
| Number of ratings | **185** | 1 |
| Positive reviews | 58.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 52 MB | 22 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Charles Vanderhoff](https://appshunter.io/developer/950621709) | [Ikki Yoshimiya](https://appshunter.io/developer/1109688814) |

## What reviewers say

### One Rep Max

[App page](https://appshunter.io/ios/app/one-rep-max-1rm-calculator/id950621710)

Safely estimate your maximum lift potential for various strength exercises using scientific formulas. Track your progress visually, set goals, and fine-tune estimates with perceived exertion. Ideal for powerlifters, CrossFit athletes, and strength enthusiasts.

**Highlights:** Precise 1RM calculations with 7 scientific formulas, RPE integration for fine-tuned estimates, Custom exercise tracking for any lift, Visual progress graphs, Percentage charts for training, Goal setting and progress monitoring

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1RM Pro Monthly | $2.99 | per month |
| 1RM Pro Annual | $19.99 | per year |
| 1RM Pro Lifetime | $49.99 | one-time |

**What reviewers like**

- 👍 Easy to use interface
- 📊 Tracks progress with charts
- ➕ Plate calculator bonus feature
- 📈 Supports multiple 1RM formulas
- 💪 Helpful for tracking RMs

**What reviewers complain about**

- 💰 Subscription required for features
- 💸 Features moved behind paywall
- 😩 Useless without subscription
- 🚫 Basic features now paid
- 💸 High subscription cost

**Reported bugs**

- Features behind paywall
- Forced ads
- Deleted lifting history
- Lost all logs with update
- Weight limit restriction

**Requested features**

- Allow editing of logs (date/time)
- Manual entry for weight preferred over slider
- Include different 1RM formulas (Epley, Brzycki)
- Ability to create custom graphs
- Fix weight limit restriction


### RM

[App page](https://appshunter.io/ios/app/rm-calculator/id1429516288)

Calculate elevation weights and training times to maximize your efficiency during weight training. Easily switch units by touching them.

**Highlights:** Calculate elevation weights, Calculate training times, Maximize training efficiency, Lean training optimization, Unit switching

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is One Rep Max free?

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

### Is RM free?

RM is free to download, with no in-app purchases.

### Which has better reviews, One Rep Max or RM?

One Rep Max is rated higher. One Rep Max averages 4.4 out of 5 from 185 ratings, while RM averages 2.0 from 1 ratings.

### Do One Rep Max or RM have ads?

One Rep Max shows ads; RM does not.

### Which is updated more often, One Rep Max or RM?

One Rep Max ships an update every 6 days, and RM monthly. Most recently, One Rep Max was updated on October 23, 2026 and RM on October 24, 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.*