# Mr. Solar Doc vs SideKey

The clearest difference is update cadence: Mr. Solar Doc at every 3 days against SideKey's every 9 days. Mr. Solar Doc also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Mr. Solar Doc sells 2 in-app purchases, starting at $14.99 per year and SideKey sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Mr. Solar Doc ships an update every 3 days, SideKey every 9 days. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Mr. Solar Doc | SideKey |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 9 days |
| Size | 10 MB | 41 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Simon Petersson](https://appshunter.io/developer/1896477085) | [Ahmet Giray Ucar](https://appshunter.io/developer/1583246836) |

## What reviewers say

### Mr. Solar Doc

[App page](https://appshunter.io/ios/app/mr-solar-doc/id6806979141)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mr. Solar Doc | $14.99 | per year |
| Solar Energy Calculation | $3.99 | one-time |


### 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 Mr. Solar Doc free?

Mr. Solar Doc is free to download, with in-app purchases available.

### Is SideKey free?

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

### Do Mr. Solar Doc or SideKey have ads?

Neither Mr. Solar Doc nor SideKey shows ads.

### Which is updated more often, Mr. Solar Doc or SideKey?

Mr. Solar Doc ships an update every 3 days, and SideKey every 9 days. Most recently, Mr. Solar Doc was updated on October 21, 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.*