# Solar Fun vs Biolumos

The clearest difference is update cadence: Solar Fun at monthly against Biolumos's every 2 months. Solar Fun also leads on iOS requirement (12.0 vs 15.1). 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 Fun ships an update monthly, Biolumos every 2 months. The most recent releases landed on October 11, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Solar Fun | Biolumos |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Size | 37 MB | 23 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [GFLAI](https://appshunter.io/developer/1788295252) | [Ilya Borisov](https://appshunter.io/developer/1877093396) |

## What reviewers say

### Solar Fun

[App page](https://appshunter.io/ios/app/solar-fun/id6467080243)

**Features:** macOS Compatibility

**In-app purchases:** none


### Biolumos

[App page](https://appshunter.io/ios/app/biolumos/id6759167997)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar Fun free?

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

### Is Biolumos free?

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

### Do Solar Fun or Biolumos have ads?

Neither Solar Fun nor Biolumos shows ads.

### Which is updated more often, Solar Fun or Biolumos?

Solar Fun ships an update monthly, and Biolumos every 2 months. Most recently, Solar Fun was updated on October 11, 2026 and Biolumos 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.*