# Fronius Solar.SOS vs OptiMOON

The clearest difference is update cadence: OptiMOON at every 3 weeks against Fronius Solar.SOS's every 3 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, OptiMOON every 3 weeks. The most recent releases landed on August 19, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Fronius Solar.SOS | OptiMOON |
| --- | --- | --- |
| 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 3 weeks** |
| Monetization | Free | — |
| Size | 15 MB | 43 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fronius International GmbH](https://appshunter.io/developer/431601279) | [Porsche Slovenija d.o.o](https://appshunter.io/developer/1446542306) |

## 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


### OptiMOON

[App page](https://appshunter.io/ios/app/optimoon/id6736896444)

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

**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 OptiMOON free?

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

### Do Fronius Solar.SOS or OptiMOON have ads?

Neither Fronius Solar.SOS nor OptiMOON shows ads.

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

Fronius Solar.SOS ships an update every 3 months, and OptiMOON every 3 weeks. Most recently, Fronius Solar.SOS was updated on August 19, 2026 and OptiMOON on September 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*