# FillBlock vs Clear 4

The clearest difference is ads: FillBlock at none against Clear 4's shown. Clear 4's advantage is update cadence (fortnightly vs every 10 months) and iOS requirement (12.0 vs 15.0). 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.

FillBlock ships an update every 10 months, Clear 4 fortnightly. The most recent releases landed on September 18, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | FillBlock | Clear 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/clear-4/id1546584385/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | — | Ad-supported |
| Size | 60 MB | 74 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kazumasa fujihara](https://appshunter.io/developer/1516573304) | [文锋 郑](https://appshunter.io/developer/1590995911) |

## What reviewers say

### FillBlock

[App page](https://appshunter.io/ios/app/fillblock/id1533974241)

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

**In-app purchases:** none


### Clear 4

[App page](https://appshunter.io/ios/app/clear-4/id1546584385)

A free puzzle game where players strategically click squares to trigger chain reactions and clear the board. It features simple mechanics with elements like rotating baffles and black holes to add complexity.

**Highlights:** Chain reaction gameplay, Strategic square clicking, Rotating baffles, Black holes, Limited steps to clear levels

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FillBlock free?

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

### Is Clear 4 free?

Clear 4 is free to download, with no in-app purchases.

### Do FillBlock or Clear 4 have ads?

Clear 4 shows ads; FillBlock does not.

### Which is updated more often, FillBlock or Clear 4?

FillBlock ships an update every 10 months, and Clear 4 fortnightly. Most recently, FillBlock was updated on September 18, 2026 and Clear 4 on June 1, 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.*