# 4HEAT vs Sigma Timer

The clearest difference is device support: 4HEAT at 3 against Sigma Timer's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

## The numbers

| Metric | 4HEAT | Sigma Timer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 24.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Size | 38 MB | 20 MB |
| Requires iOS | **15.0.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [TIEMME ELETTRONICA SRL](https://appshunter.io/developer/1225571704) | [Sigma Laborzentrifugen GmbH](https://appshunter.io/developer/1731355921) |

## What reviewers say

### 4HEAT

[App page](https://appshunter.io/ios/app/4heat/id1193541312)

Control your Tiemme Heating system remotely with this application. Manage your home's temperature and heating schedules from your smartphone or tablet.

**Highlights:** Remote heating system control, Temperature management, Schedule adjustments, Smartphone/tablet compatibility, Tiemme Heating system integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Sigma Timer

[App page](https://appshunter.io/ios/app/sigma-timer/id6478013776)

**In-app purchases:** none


## Frequently asked questions

### Is 4HEAT free?

4HEAT is free to download, with no in-app purchases.

### Is Sigma Timer free?

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

### Do 4HEAT or Sigma Timer have ads?

Neither 4HEAT nor Sigma Timer shows ads.

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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.*