# Voltomat Heating vs Ozzo

The clearest difference is update cadence: Ozzo at every 4 days against Voltomat Heating's every 7 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.

Voltomat Heating ships an update every 7 months, Ozzo every 4 days. The most recent releases landed on September 30, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Voltomat Heating | Ozzo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 days** |
| Size | 62 MB | 110 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Home Domotic Developments, S.L.](https://appshunter.io/developer/1481462876) | [TON Creative Studios AB](https://appshunter.io/developer/1589330753) |

## What reviewers say

### Voltomat Heating

[App page](https://appshunter.io/ios/app/voltomat-heating/id1481462877)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ozzo

[App page](https://appshunter.io/ios/app/ozzo/id6758411969)

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

**In-app purchases:** none


## Frequently asked questions

### Is Voltomat Heating free?

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

### Is Ozzo free?

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

### Do Voltomat Heating or Ozzo have ads?

Neither Voltomat Heating nor Ozzo shows ads.

### Which is updated more often, Voltomat Heating or Ozzo?

Voltomat Heating ships an update every 7 months, and Ozzo every 4 days. Most recently, Voltomat Heating was updated on September 30, 2026 and Ozzo on October 10, 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.*