# Circuit 41 vs SideKey

The clearest difference is in-app purchases: Circuit 41 at none against SideKey's 2. Circuit 41 also leads on device support (3 vs 1) and iOS requirement (15.1 vs 18.6). SideKey's advantage is update cadence (every 9 days vs every 3 weeks). On price and ads there is nothing between them.

Both are free to download. SideKey sells 2 in-app purchases, starting at $3.99 per 7 days. Circuit 41 asks for nothing beyond the download.

Circuit 41 ships an update every 3 weeks, SideKey every 9 days. The most recent releases landed on October 10, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Circuit 41 | SideKey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Size | 52 MB | 41 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Circuit 40s](https://appshunter.io/developer/1895054215) | [Ahmet Giray Ucar](https://appshunter.io/developer/1583246836) |

## What reviewers say

### Circuit 41

[App page](https://appshunter.io/ios/app/circuit-41/id6762875315)

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

**In-app purchases:** none


### SideKey

[App page](https://appshunter.io/ios/app/sidekey-custom-action-button/id6814712920)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SideKey+ Weekly | $3.99 | per 7 days |
| SideKey+ Yearly | $24.99 | per year |


## Frequently asked questions

### Is Circuit 41 free?

Circuit 41 is free to download, with no in-app purchases.

### Is SideKey free?

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

### Do Circuit 41 or SideKey have ads?

Neither Circuit 41 nor SideKey shows ads.

### Which is updated more often, Circuit 41 or SideKey?

Circuit 41 ships an update every 3 weeks, and SideKey every 9 days. Most recently, Circuit 41 was updated on October 10, 2026 and SideKey on October 20, 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.*