# HEMS Timer vs Vattenfall Smart Termostat

The clearest difference is update cadence: HEMS Timer at fortnightly against Vattenfall Smart Termostat's every 2 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.

HEMS Timer ships an update fortnightly, Vattenfall Smart Termostat every 2 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | HEMS Timer | Vattenfall Smart Termostat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 2 MB | 37 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Per Ostergren](https://appshunter.io/developer/1064416293) | [Ngenic](https://appshunter.io/developer/949669224) |

## What reviewers say

### HEMS Timer

[App page](https://appshunter.io/ios/app/hems-timer/id1434519516)

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

**In-app purchases:** none


### Vattenfall Smart Termostat

[App page](https://appshunter.io/ios/app/vattenfall-smart-termostat/id1458032576)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HEMS Timer free?

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

### Is Vattenfall Smart Termostat free?

Vattenfall Smart Termostat is free to download, with no in-app purchases.

### Do HEMS Timer or Vattenfall Smart Termostat have ads?

Neither HEMS Timer nor Vattenfall Smart Termostat shows ads.

### Which is updated more often, HEMS Timer or Vattenfall Smart Termostat?

HEMS Timer ships an update fortnightly, and Vattenfall Smart Termostat every 2 months. Most recently, HEMS Timer was updated on October 7, 2026 and Vattenfall Smart Termostat on October 1, 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.*