# MyThermowatt vs A2O

The clearest difference is update cadence: MyThermowatt at every 2 months against A2O's every 11 months. A2O's advantage is iOS requirement (13.0 vs 15.0). 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.

MyThermowatt ships an update every 2 months, A2O every 11 months. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | MyThermowatt | A2O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/a2o/id6443875849/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | — | Free |
| Size | 88 MB | 188 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Thermowatt SpA](https://appshunter.io/developer/1619740671) | [Aquaporin](https://appshunter.io/developer/1573920954) |

## What reviewers say

### MyThermowatt

[App page](https://appshunter.io/ios/app/mythermowatt/id1619740669)

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

**In-app purchases:** none


### A2O

[App page](https://appshunter.io/ios/app/a2o/id6443875849)

Manage your water purifier from your smartphone, track real-time water usage, and receive timely filter change reminders. Access product manuals and helpful water information.

**Highlights:** Connect and manage water purifier, Track real-time water usage, Filter change reminders, Maintenance guidance, Access product manuals, View purification effectiveness

**In-app purchases:** none


## Frequently asked questions

### Is MyThermowatt free?

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

### Is A2O free?

A2O is free to download, with no in-app purchases.

### Do MyThermowatt or A2O have ads?

Neither MyThermowatt nor A2O shows ads.

### Which is updated more often, MyThermowatt or A2O?

MyThermowatt ships an update every 2 months, and A2O every 11 months. Most recently, MyThermowatt was updated on October 17, 2026 and A2O on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*