# Fronius Solar.SOS vs Down Under Bridge Units

The clearest difference is update cadence: Fronius Solar.SOS at every 3 months against Down Under Bridge Units's every 10 months. Down Under Bridge Units's advantage is iOS requirement (12.0 vs 15.0). 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, Down Under Bridge Units every 10 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fronius Solar.SOS | Down Under Bridge Units |
| --- | --- | --- |
| 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 10 months |
| Monetization | Free | — |
| Size | 15 MB | 44 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fronius International GmbH](https://appshunter.io/developer/431601279) | [EWP Truck Hire Pty Ltd](https://appshunter.io/developer/1638221751) |

## 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


### Down Under Bridge Units

[App page](https://appshunter.io/ios/app/down-under-bridge-units/id1640447317)

**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 Down Under Bridge Units free?

Down Under Bridge Units is free to download, with no in-app purchases.

### Do Fronius Solar.SOS or Down Under Bridge Units have ads?

Neither Fronius Solar.SOS nor Down Under Bridge Units shows ads.

### Which is updated more often, Fronius Solar.SOS or Down Under Bridge Units?

Fronius Solar.SOS ships an update every 3 months, and Down Under Bridge Units every 10 months. Most recently, Fronius Solar.SOS was updated on November 3, 2026 and Down Under Bridge Units on October 30, 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.*