# RM vs 1RM Calculator

The clearest difference is rating: 1RM Calculator at 4.9 against RM's 2.0. 1RM Calculator also leads on ratings volume (128 vs 1). RM's advantage is in-app purchases (none vs 3) and update cadence (monthly vs every 4 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. 1RM Calculator sells 3 in-app purchases, starting at $1.99 per month. RM asks for nothing beyond the download.

1RM Calculator holds the better App Store score, 4.9 against 2.0. That said, the two scores are not equally well evidenced: 1RM Calculator has 128 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

RM ships an update monthly, 1RM Calculator every 4 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RM | 1RM Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/rm-calculator/id1429516288/reviews) | **[4.9 (128 ratings)](https://appshunter.io/ios/app/1rm-calculator/id1566775126/reviews)** |
| Number of ratings | 1 | **128** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 28 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ikki Yoshimiya](https://appshunter.io/developer/1109688814) | [Yuri Koshiishi](https://appshunter.io/developer/1566775128) |

## What reviewers say

### 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


### 1RM Calculator

[App page](https://appshunter.io/ios/app/1rm-calculator/id1566775126)

Easily calculate your one-rep max (1RM) strength with this app. It supports RPE input and allows you to estimate rep maxes based on your 1RM. Track your progress by saving your 1RM history for different exercises.

**Highlights:** 1RM calculation with RPE, Rep max estimation, Save 1RM history, Customizable exercises, Dark theme

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Rep Max Pro Monthly | $1.99 | per month |
| 1 Rep Max Pro Annual | $9.99 | per year |
| 1 Rep Max Pro Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is RM free?

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

### Is 1RM Calculator free?

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

### Which has better reviews, RM or 1RM Calculator?

1RM Calculator is rated higher. RM averages 2.0 out of 5 from 1 ratings, while 1RM Calculator averages 4.9 from 128 ratings.

### Do RM or 1RM Calculator have ads?

Neither RM nor 1RM Calculator shows ads.

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

RM ships an update monthly, and 1RM Calculator every 4 months. Most recently, RM was updated on October 24, 2026 and 1RM Calculator on October 30, 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.*