# Gravity One vs Universe Fly

The clearest difference is ads: Gravity One at none against Universe Fly's shown. Universe Fly's advantage is update cadence (every 2 months vs every 9 months) and iOS requirement (15.0 vs 18.0). On price, 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.

Gravity One ships an update every 9 months, Universe Fly every 2 months. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Gravity One | Universe Fly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 2 months** |
| Size | 15 MB | 71 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sami Salkosuo](https://appshunter.io/developer/820432278) | [SHIH-CHEN FAN](https://appshunter.io/developer/1563674002) |

## What reviewers say

### Gravity One

[App page](https://appshunter.io/ios/app/gravity-one/id820432275)

**Features:** macOS Compatibility

**In-app purchases:** none


### Universe Fly

[App page](https://appshunter.io/ios/app/universe-fly/id6470925331)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gravity One free?

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

### Is Universe Fly free?

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

### Do Gravity One or Universe Fly have ads?

Universe Fly shows ads; Gravity One does not.

### Which is updated more often, Gravity One or Universe Fly?

Gravity One ships an update every 9 months, and Universe Fly every 2 months. Most recently, Gravity One was updated on September 14, 2026 and Universe Fly on September 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.*