# 1RM vs E1RM Calculator

The clearest difference is ads: E1RM Calculator at none against 1RM's shown. 1RM's advantage is iOS requirement (12.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 1RM sells 1 in-app purchase, starting at $0.99 per 7 days and E1RM Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 1RM | E1RM Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | — | Every 8 days |
| Size | 67 MB | 0 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [ABDULLAH YAVUZ](https://appshunter.io/developer/1724192354) | [Paul Walsh](https://appshunter.io/developer/1879357731) |

## What reviewers say

### 1RM

[App page](https://appshunter.io/ios/app/1rm-one-rep-max-calculator/id6480014506)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1RM Pro | $0.99 | per 7 days |


### E1RM Calculator

[App page](https://appshunter.io/ios/app/e1rm-calculator-rpe-based/id6759536865)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Developer | $1.99 | one-time |


## Frequently asked questions

### Is 1RM free?

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

### Is E1RM Calculator free?

E1RM Calculator is free to download, with in-app purchases available.

### Do 1RM or E1RM Calculator have ads?

1RM shows ads; E1RM Calculator does not.

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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.*