# UFO Puzzle vs Gem Digger

The clearest difference is update cadence: Gem Digger at every 3 months against UFO Puzzle's every 23 months. Gem Digger also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. UFO Puzzle sells 1 one-off in-app purchase and Gem Digger sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UFO Puzzle ships an update every 23 months, Gem Digger every 3 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | UFO Puzzle | Gem Digger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ufo-puzzle/id1397690042/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 23 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 30 MB | 52 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chris DeWeese](https://appshunter.io/developer/1219015186) | [Seif Ibrahim](https://appshunter.io/developer/1173469733) |

## What reviewers say

### UFO Puzzle

[App page](https://appshunter.io/ios/app/ufo-puzzle/id1397690042)

Navigate challenging 3D mazes in an alien world to collect gems and power your ship to return home. This adventure game features hand-crafted levels and engaging space music, offering hours of addictive fun without distractions.

**Highlights:** 3D puzzle adventure, Collect all gems, Navigate difficult mazes, Hand-made graphics and levels, Space music, No ads

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Gem Digger

[App page](https://appshunter.io/ios/app/gem-digger-cave-quest/id6780266274)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crystal Caves | $2.99 | one-time |
| Magma Depths | $2.99 | one-time |
| Frozen Hollow | $2.99 | one-time |
| Remove Ads | $3.99 | one-time |
| Unlock All Worlds | $6.99 | one-time |
| Complete Edition | $9.99 | one-time |


## Frequently asked questions

### Is UFO Puzzle free?

UFO Puzzle is free to download, with in-app purchases available.

### Is Gem Digger free?

Gem Digger is free to download, with in-app purchases available.

### Do UFO Puzzle or Gem Digger have ads?

Both UFO Puzzle and Gem Digger show ads.

### Which is updated more often, UFO Puzzle or Gem Digger?

UFO Puzzle ships an update every 23 months, and Gem Digger every 3 months. Most recently, UFO Puzzle was updated on October 24, 2026 and Gem Digger on October 24, 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.*