# SR Alarm vs H2PRO

The clearest difference is update cadence: H2PRO at daily against SR Alarm's every 3 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.

SR Alarm ships an update every 3 months, H2PRO daily. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | SR Alarm | H2PRO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Size | 138 MB | 4 MB |
| Requires iOS | 9.3 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ever Energy Group GmbH](https://appshunter.io/developer/1057181240) | [Berliner Wasserbetriebe](https://appshunter.io/developer/951724681) |

## What reviewers say

### SR Alarm

[App page](https://appshunter.io/ios/app/sr-alarm/id1057181241)

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

**In-app purchases:** none


### H2PRO

[App page](https://appshunter.io/ios/app/h2pro/id1444999092)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SR Alarm free?

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

### Is H2PRO free?

H2PRO is free to download, with no in-app purchases.

### Do SR Alarm or H2PRO have ads?

Neither SR Alarm nor H2PRO shows ads.

### Which is updated more often, SR Alarm or H2PRO?

SR Alarm ships an update every 3 months, and H2PRO daily. Most recently, SR Alarm was updated on October 24, 2026 and H2PRO on October 19, 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.*