# 1RM Calculator vs FFMI

The clearest difference is device support: 1RM Calculator at 3 against FFMI's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 1RM Calculator sells 3 in-app purchases, starting at $1.99 per month and FFMI sells 1 in-app purchase, starting at $0.99 per year. Whichever you choose, the download price is not the number that matters.

1RM Calculator ships an update every 4 months, FFMI every 3 months. The most recent releases landed on October 20, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 1RM Calculator | FFMI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (116 ratings)](https://appshunter.io/ios/app/1rm-calculator/id1566775126/reviews)** | — |
| Number of ratings | **116** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 6 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuri Koshiishi](https://appshunter.io/developer/1566775128) | [Almudena Blanco Morett](https://appshunter.io/developer/1616421372) |

## What reviewers say

### 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 |


### FFMI

[App page](https://appshunter.io/ios/app/ffmi/id6673907322)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Year Access | $0.99 | per year |


## Frequently asked questions

### Is 1RM Calculator free?

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

### Is FFMI free?

FFMI is free to download, with in-app purchases available.

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

Neither 1RM Calculator nor FFMI shows ads.

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

1RM Calculator ships an update every 4 months, and FFMI every 3 months. Most recently, 1RM Calculator was updated on October 20, 2026 and FFMI on October 3, 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.*