# Zero Gravity 3D vs Rolly Legs

The clearest difference is in-app purchases: Zero Gravity 3D at none against Rolly Legs's 1. Zero Gravity 3D also leads on iOS requirement (10.0 vs 15.0). Rolly Legs's advantage is update cadence (fortnightly vs every 20 months). On price, ads and device support there is nothing between them.

Both are free to download. Rolly Legs sells 1 one-off in-app purchase. Zero Gravity 3D asks for nothing beyond the download.

Zero Gravity 3D ships an update every 20 months, Rolly Legs fortnightly. The most recent releases landed on September 10, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Zero Gravity 3D | Rolly Legs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (101K ratings)](https://appshunter.io/ios/app/rolly-legs/id1502139765/reviews)** |
| Number of ratings | — | **101K** |
| Positive reviews | — | 47.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 20 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 83 MB | 274 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 12+ |
| Developer | [喜拉 任](https://appshunter.io/developer/1447216936) | [Voodoo](https://appshunter.io/developer/714804730) |

## What reviewers say

### Zero Gravity 3D

[App page](https://appshunter.io/ios/app/zero-gravity-3d/id1476355895)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rolly Legs

[App page](https://appshunter.io/ios/app/rolly-legs/id1502139765)

Control a robot with unique rolling and walking mechanics to race and overcome challenging terrain. Master physics-based movement to gain speed on slopes and navigate difficult climbs to reach the finish line first.

**Highlights:** Physics-based robot control, Rolling on slopes for speed, Climbing with articulated legs, Race to victory, Master challenging terrain

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NO ADS | $2.99 | one-time |

**What reviewers like**

- 👍 Fun and addictive game
- 🚀 Barely any ads
- 🚀 Entertaining gameplay
- 👍 Kid-friendly

**What reviewers complain about**

- 🐛 Bots teleport and cheat
- 🐛 Repetitive levels
- 🔋 Too many ads
- 🐛 Glitches and bugs

**Reported bugs**

- Bots teleport and catch up unfairly
- Game crashes after watching ads
- Finish line not registering properly

**Requested features**

- Add more levels and themes
- Introduce power-ups and customization options
- Remove teleporting bots
- Add online multiplayer mode


## Frequently asked questions

### Is Zero Gravity 3D free?

Zero Gravity 3D is free to download, with no in-app purchases.

### Is Rolly Legs free?

Rolly Legs is free to download, with in-app purchases available.

### Do Zero Gravity 3D or Rolly Legs have ads?

Both Zero Gravity 3D and Rolly Legs show ads.

### Which is updated more often, Zero Gravity 3D or Rolly Legs?

Zero Gravity 3D ships an update every 20 months, and Rolly Legs fortnightly. Most recently, Zero Gravity 3D was updated on September 10, 2026 and Rolly Legs on September 25, 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.*