# Fronius Solar.SOS vs HiSolar

The clearest difference is review sentiment: HiSolar at 50% against Fronius Solar.SOS's 0%. HiSolar also leads on update cadence (monthly vs every 3 months) and iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and monetization model 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, HiSolar monthly. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Fronius Solar.SOS | HiSolar |
| --- | --- | --- |
| 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 | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 15 MB | 257 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) | [深圳市泽联格迈科技有限公司](https://appshunter.io/developer/1768209769) |

## 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


### HiSolar

[App page](https://appshunter.io/ios/app/hisolar/id6447599228)

Monitor and control your green energy devices locally. View device status, adjust settings, check alarms, and export logs. Update firmware directly from your mobile phone.

**Highlights:** Local device login, Monitor running status, Set parameters, View alarms, Export logs, Update firmware

**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 HiSolar free?

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

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

Neither Fronius Solar.SOS nor HiSolar shows ads.

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

Fronius Solar.SOS ships an update every 3 months, and HiSolar monthly. Most recently, Fronius Solar.SOS was updated on October 24, 2026 and HiSolar on October 14, 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.*