# UFO Puzzle vs Fill Blocks!

The clearest difference is in-app purchases: Fill Blocks! at none against UFO Puzzle's 1. Fill Blocks! also leads on update cadence (every 4 days vs every 23 months) and iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. UFO Puzzle sells 1 one-off in-app purchase. Fill Blocks! asks for nothing beyond the download.

UFO Puzzle ships an update every 23 months, Fill Blocks! every 4 days. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | UFO Puzzle | Fill Blocks! |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 23 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 30 MB | 175 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chris DeWeese](https://appshunter.io/developer/1219015186) | [Ezgi Evrensel](https://appshunter.io/developer/1664776677) |

## 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 |


### Fill Blocks!

[App page](https://appshunter.io/ios/app/fill-blocks/id6480924092)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is UFO Puzzle free?

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

### Is Fill Blocks! free?

Fill Blocks! is free to download, with no in-app purchases.

### Do UFO Puzzle or Fill Blocks! have ads?

Both UFO Puzzle and Fill Blocks! show ads.

### Which is updated more often, UFO Puzzle or Fill Blocks!?

UFO Puzzle ships an update every 23 months, and Fill Blocks! every 4 days. Most recently, UFO Puzzle was updated on October 24, 2026 and Fill Blocks! on October 14, 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.*