# SOLAR ONE vs Austa Solar

The clearest difference is update cadence: SOLAR ONE at every 4 months against Austa Solar's every 8 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.

SOLAR ONE ships an update every 4 months, Austa Solar every 8 months. Both last shipped on October 11, 2026.

## The numbers

| Metric | SOLAR ONE | Austa Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 8 months |
| Size | 347 MB | 66 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Solar One](https://appshunter.io/developer/1649006606) | [Ningbo Osda Solar Co., Ltd.](https://appshunter.io/developer/1696929762) |

## What reviewers say

### SOLAR ONE

[App page](https://appshunter.io/ios/app/solar-one/id6443745666)

**Features:** macOS Compatibility

**In-app purchases:** none


### Austa Solar

[App page](https://appshunter.io/ios/app/austa-solar/id6451139834)

**In-app purchases:** none


## Frequently asked questions

### Is SOLAR ONE free?

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

### Is Austa Solar free?

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

### Do SOLAR ONE or Austa Solar have ads?

Neither SOLAR ONE nor Austa Solar shows ads.

### Which is updated more often, SOLAR ONE or Austa Solar?

SOLAR ONE ships an update every 4 months, and Austa Solar every 8 months. Most recently, SOLAR ONE was updated on October 11, 2026 and Austa Solar on October 11, 2026.

---

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