# sunarix vs M

The clearest difference is ads: sunarix at none against M's shown. sunarix also leads on update cadence (monthly vs every 4 months) and iOS requirement (12.0 vs 15.0). On price, 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.

sunarix ships an update monthly, M every 4 months. The most recent releases landed on September 8, 2026 and July 21, 2026 respectively.

## The numbers

| Metric | sunarix | M |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | — | Ad-supported |
| Size | 53 MB | 56 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [sunarix GmbH](https://appshunter.io/developer/1716823975) | [M-TEC Energy Systems GmbH](https://appshunter.io/developer/1660700474) |

## What reviewers say

### sunarix

[App page](https://appshunter.io/ios/app/sunarix/id6472238779)

**Features:** macOS Compatibility

**In-app purchases:** none


### M

[App page](https://appshunter.io/ios/app/m-tec-e-smart/id6478609608)

Monitor and manage your building's energy flows, generation, and consumption directly from your smartphone. Gain insights with daily, monthly, and annual evaluations, and control connected devices like chargers and heat pumps for increased efficiency and sustainability.

**Highlights:** Visualize energy flows, Energy generation and consumption overview, Daily, monthly, annual evaluations, Energy-Charger control, Heat pump control, Remote energy management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is sunarix free?

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

### Is M free?

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

### Do sunarix or M have ads?

M shows ads; sunarix does not.

### Which is updated more often, sunarix or M?

sunarix ships an update monthly, and M every 4 months. Most recently, sunarix was updated on September 8, 2026 and M on July 21, 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.*