# Locking Check vs Forgotten prevention

The clearest difference is in-app purchases: Forgotten prevention at none against Locking Check's 1. Forgotten prevention also leads on iOS requirement (10.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Locking Check sells 1 one-off in-app purchase. Forgotten prevention asks for nothing beyond the download.

Locking Check ships an update every 6 weeks, Forgotten prevention every 3 weeks. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Locking Check | Forgotten prevention |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 5 MB | 23 MB |
| Requires iOS | 14.0 | **10.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Atsushi Ezaki](https://appshunter.io/developer/1099847684) | [Toshinobu Miyauchi](https://appshunter.io/developer/1440120350) |

## What reviewers say

### Locking Check

[App page](https://appshunter.io/ios/app/locking-check/id1523162174)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide Ads | $1.99 | one-time |


### Forgotten prevention

[App page](https://appshunter.io/ios/app/forgotten-preventionyosshi/id1576107612)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Locking Check free?

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

### Is Forgotten prevention free?

Forgotten prevention is free to download, with no in-app purchases.

### Do Locking Check or Forgotten prevention have ads?

Both Locking Check and Forgotten prevention show ads.

### Which is updated more often, Locking Check or Forgotten prevention?

Locking Check ships an update every 6 weeks, and Forgotten prevention every 3 weeks. Most recently, Locking Check was updated on November 7, 2026 and Forgotten prevention on November 3, 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.*