# Fronius Solar.SOS vs ETHERMA eTOUCH

The clearest difference is update cadence: Fronius Solar.SOS at every 3 months against ETHERMA eTOUCH's every 16 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.

Fronius Solar.SOS ships an update every 3 months, ETHERMA eTOUCH every 16 months. The most recent releases landed on August 19, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Fronius Solar.SOS | ETHERMA eTOUCH |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/fronius-solarsos/id1516602936/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 16 months |
| Monetization | Free | — |
| Size | 15 MB | 41 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fronius International GmbH](https://appshunter.io/developer/431601279) | [ETHERMA Holding GmbH](https://appshunter.io/developer/1606968285) |

## What reviewers say

### Fronius Solar.SOS

[App page](https://appshunter.io/ios/app/fronius-solarsos/id1516602936)

This business tool helps installers quickly resolve technical issues with solar systems. It allows for easy ordering of replacement parts and provides access to important documentation. The app streamlines the service process directly at the installation site.

**Highlights:** Manage multiple accounts, Order replacement parts, Track order status, Messaging with support, Access installation guides, Troubleshoot technical issues

**In-app purchases:** none


### ETHERMA eTOUCH

[App page](https://appshunter.io/ios/app/etherma-etouch/id1606968283)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fronius Solar.SOS free?

Fronius Solar.SOS is free to download, with no in-app purchases.

### Is ETHERMA eTOUCH free?

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

### Do Fronius Solar.SOS or ETHERMA eTOUCH have ads?

Neither Fronius Solar.SOS nor ETHERMA eTOUCH shows ads.

### Which is updated more often, Fronius Solar.SOS or ETHERMA eTOUCH?

Fronius Solar.SOS ships an update every 3 months, and ETHERMA eTOUCH every 16 months. Most recently, Fronius Solar.SOS was updated on August 19, 2026 and ETHERMA eTOUCH on September 17, 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.*