# USM lock C vs Let the Wheel Decide

The clearest difference is in-app purchases: USM lock C at none against Let the Wheel Decide's 3. USM lock C also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Let the Wheel Decide sells 3 in-app purchases, starting at $1.99 per 7 days. USM lock C asks for nothing beyond the download.

USM lock C ships an update every 3 months, Let the Wheel Decide every 2 months. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | USM lock C | Let the Wheel Decide |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 47 MB | 14 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [USM U. Schaerer Soehne AG](https://appshunter.io/developer/395765701) | [Stephane Rodriguez](https://appshunter.io/developer/1867499809) |

## What reviewers say

### USM lock C

[App page](https://appshunter.io/ios/app/usm-lock-c/id6467190717)

**Features:** macOS Compatibility

**In-app purchases:** none


### Let the Wheel Decide

[App page](https://appshunter.io/ios/app/let-the-wheel-decide/id6803664677)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $1.99 | per 7 days |
| Monthly Premium | $3.99 | per month |
| Lifetime Premium | $8.99 | one-time |


## Frequently asked questions

### Is USM lock C free?

USM lock C is free to download, with no in-app purchases.

### Is Let the Wheel Decide free?

Let the Wheel Decide is free to download, with in-app purchases available.

### Do USM lock C or Let the Wheel Decide have ads?

Neither USM lock C nor Let the Wheel Decide shows ads.

### Which is updated more often, USM lock C or Let the Wheel Decide?

USM lock C ships an update every 3 months, and Let the Wheel Decide every 2 months. Most recently, USM lock C was updated on October 30, 2026 and Let the Wheel Decide on November 6, 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.*