# ACM for locks vs OTA upgrade

The clearest difference is ads: OTA upgrade at none against ACM for locks's shown. OTA upgrade also leads on update cadence (every 2 months vs every 6 months) and iOS requirement (12.1 vs 16.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ACM for locks ships an update every 6 months, OTA upgrade every 2 months. The most recent releases landed on October 27, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ACM for locks | OTA upgrade |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 2 months** |
| Size | 10 MB | 39 MB |
| Requires iOS | 16.0 | **12.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [WOBBI TECHNOLOGY LIMITED](https://appshunter.io/developer/1667483448) | [HUIZHOU REDBOX ELECTRONICS CO,.LTD](https://appshunter.io/developer/1693036399) |

## What reviewers say

### ACM for locks

[App page](https://appshunter.io/ios/app/acm-for-locks/id6446193435)

**Features:** macOS Compatibility

**In-app purchases:** none


### OTA upgrade

[App page](https://appshunter.io/ios/app/ota-upgrade/id6450377634)

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

**In-app purchases:** none


## Frequently asked questions

### Is ACM for locks free?

ACM for locks is free to download, with no in-app purchases.

### Is OTA upgrade free?

OTA upgrade is free to download, with no in-app purchases.

### Do ACM for locks or OTA upgrade have ads?

ACM for locks shows ads; OTA upgrade does not.

### Which is updated more often, ACM for locks or OTA upgrade?

ACM for locks ships an update every 6 months, and OTA upgrade every 2 months. Most recently, ACM for locks was updated on October 27, 2026 and OTA upgrade on October 10, 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.*