# e vs HAT

The clearest difference is update cadence: HAT at every 4 months against e's every 9 months. e's advantage is iOS requirement (7.0 vs 11.0). 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.

e ships an update every 9 months, HAT every 4 months. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | e | HAT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 months** |
| Size | 3 MB | 40 MB |
| Requires iOS | **7.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eminent Europe B.V.](https://appshunter.io/developer/572527478) | [hikvision](https://appshunter.io/developer/1222251068) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-alarm/id637246607)

**In-app purchases:** none


### HAT

[App page](https://appshunter.io/ios/app/hat-360/id6472250771)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is e free?

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

### Is HAT free?

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

### Do e or HAT have ads?

Neither e nor HAT shows ads.

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

e ships an update every 9 months, and HAT every 4 months. Most recently, e was updated on October 3, 2026 and HAT on October 17, 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.*