# OMA vs HAT

The clearest difference is update cadence: HAT at every 4 months against OMA's every 19 months. On price, ads, 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.

OMA ships an update every 19 months, HAT every 4 months. The most recent releases landed on September 16, 2026 and February 26, 2026 respectively.

## The numbers

| Metric | OMA | HAT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 4 months** |
| Size | 11 MB | 40 MB |
| Requires iOS | **10.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zhejiang Huaruijie Technology CO.,LTD](https://appshunter.io/developer/1547428239) | [hikvision](https://appshunter.io/developer/1222251068) |

## What reviewers say

### OMA

[App page](https://appshunter.io/ios/app/oma-web/id6444197960)

**Features:** macOS Compatibility

**In-app purchases:** none


### HAT

[App page](https://appshunter.io/ios/app/hat/id6472250771)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OMA free?

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

### Is HAT free?

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

### Do OMA or HAT have ads?

Neither OMA nor HAT shows ads.

### Which is updated more often, OMA or HAT?

OMA ships an update every 19 months, and HAT every 4 months. Most recently, OMA was updated on September 16, 2026 and HAT on February 26, 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.*