# MasterTherm vs Adlar

The clearest difference is update cadence: Adlar at every 10 days against MasterTherm's every 9 months. MasterTherm's advantage is device support (3 vs 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.

MasterTherm ships an update every 9 months, Adlar every 10 days. The most recent releases landed on September 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | MasterTherm | Adlar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mastertherm/id622404273/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 15 MB | 61 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Neoware s.r.o.](https://appshunter.io/developer/622404276) | [Adlar Castra](https://appshunter.io/developer/1844618360) |

## What reviewers say

### MasterTherm

[App page](https://appshunter.io/ios/app/mastertherm/id622404273)

Remotely monitor and control your MasterTherm heat pump from your iPhone or iPad. Adjust operating modes, set temperatures, manage heating circuits, and even view weather forecasts for your location.

**Highlights:** Remote heat pump status monitoring, Control operation mode and temperature, Setup weather compensation, On/Off switching, Monitor heating circuits, View weather forecast

**Features:** macOS Compatibility

**In-app purchases:** none


### Adlar

[App page](https://appshunter.io/ios/app/adlar/id6753714742)

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

**In-app purchases:** none


## Frequently asked questions

### Is MasterTherm free?

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

### Is Adlar free?

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

### Do MasterTherm or Adlar have ads?

Neither MasterTherm nor Adlar shows ads.

### Which is updated more often, MasterTherm or Adlar?

MasterTherm ships an update every 9 months, and Adlar every 10 days. Most recently, MasterTherm was updated on September 30, 2026 and Adlar on October 13, 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.*