# SOSSEN vs Solar

The clearest difference is update cadence: SOSSEN at every 3 weeks against Solar's every 2 months. SOSSEN also leads on iOS requirement (8.0 vs 11.0). 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.

SOSSEN ships an update every 3 weeks, Solar every 2 months. The most recent releases landed on October 30, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | SOSSEN | Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 39 MB | 32 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Xiamen Sossen Energy Co., Ltd.](https://appshunter.io/developer/1732974101) | [厦门蓝旭科技有限公司](https://appshunter.io/developer/1722214713) |

## What reviewers say

### SOSSEN

[App page](https://appshunter.io/ios/app/sossen/id6449204768)

**In-app purchases:** none


### Solar

[App page](https://appshunter.io/ios/app/solar-lit-scada/id6474659001)

**In-app purchases:** none


## Frequently asked questions

### Is SOSSEN free?

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

### Is Solar free?

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

### Do SOSSEN or Solar have ads?

Neither SOSSEN nor Solar shows ads.

### Which is updated more often, SOSSEN or Solar?

SOSSEN ships an update every 3 weeks, and Solar every 2 months. Most recently, SOSSEN was updated on October 30, 2026 and Solar on October 8, 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.*