# ARC gym vs E1RM Calculator

The clearest difference is in-app purchases: ARC gym at none against E1RM Calculator's 1. ARC gym also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.0). E1RM Calculator's advantage is update cadence (every 8 days vs every 3 months). On price and ads there is nothing between them.

Both are free to download. E1RM Calculator sells 1 one-off in-app purchase. ARC gym asks for nothing beyond the download.

ARC gym ships an update every 3 months, E1RM Calculator every 8 days. The most recent releases landed on October 8, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ARC gym | E1RM Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 8 days** |
| Size | 56 MB | 0 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TeamUp Sports](https://appshunter.io/developer/1449504626) | [Paul Walsh](https://appshunter.io/developer/1879357731) |

## What reviewers say

### ARC gym

[App page](https://appshunter.io/ios/app/arc-gym/id6758386842)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 ARC gym free?

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

### Is E1RM Calculator free?

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

### Do ARC gym or E1RM Calculator have ads?

Neither ARC gym nor E1RM Calculator shows ads.

### Which is updated more often, ARC gym or E1RM Calculator?

ARC gym ships an update every 3 months, and E1RM Calculator every 8 days. Most recently, ARC gym was updated on October 8, 2026 and E1RM Calculator on October 12, 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.*