# VARTA.install vs M

The clearest difference is ads: VARTA.install at none against M's shown. VARTA.install also leads on update cadence (every 2 months vs every 4 months). On price, in-app purchases, device support 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.

VARTA.install ships an update every 2 months, M every 4 months. The most recent releases landed on September 8, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | VARTA.install | M |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | — | Ad-supported |
| Size | 85 MB | 56 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VARTA Storage GmbH](https://appshunter.io/developer/1551997277) | [M-TEC Energy Systems GmbH](https://appshunter.io/developer/1660700474) |

## What reviewers say

### VARTA.install

[App page](https://appshunter.io/ios/app/vartainstall/id6446901836)

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

**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 VARTA.install free?

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

### Is M free?

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

### Do VARTA.install or M have ads?

M shows ads; VARTA.install does not.

### Which is updated more often, VARTA.install or M?

VARTA.install ships an update every 2 months, and M every 4 months. Most recently, VARTA.install was updated on September 8, 2026 and M on September 29, 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.*