# A2O vs IamThermowatt

The clearest difference is iOS requirement: A2O at 13.0 against IamThermowatt's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

A2O ships an update every 11 months, IamThermowatt every 15 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | A2O | IamThermowatt |
| --- | --- | --- |
| 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 11 months** | Every 15 months |
| Monetization | Free | — |
| Size | 188 MB | 68 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Aquaporin](https://appshunter.io/developer/1573920954) | [Thermowatt SpA](https://appshunter.io/developer/1619740671) |

## What reviewers say

### 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


### IamThermowatt

[App page](https://appshunter.io/ios/app/iamthermowatt/id6451049295)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A2O free?

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

### Is IamThermowatt free?

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

### Do A2O or IamThermowatt have ads?

Neither A2O nor IamThermowatt shows ads.

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

A2O ships an update every 11 months, and IamThermowatt every 15 months. Most recently, A2O was updated on November 3, 2026 and IamThermowatt on November 3, 2026.

---

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