# Block Builder 3D Free vs Float or Sink

The clearest difference is in-app purchases: Float or Sink at none against Block Builder 3D Free's 1. Block Builder 3D Free's advantage is ads (none vs shown) and update cadence (every 5 months vs every 47 months). On price, rating and device support there is nothing between them.

Both are free to download. Block Builder 3D Free sells 1 one-off in-app purchase. Float or Sink asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.1 for Block Builder 3D Free against 4.0 for Float or Sink. That said, the two scores are not equally well evidenced: Block Builder 3D Free has 193 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 79% of Block Builder 3D Free's written reviews are positive against 50% of Float or Sink's.

Block Builder 3D Free ships an update every 5 months, Float or Sink every 47 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Block Builder 3D Free | Float or Sink |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (193 ratings)](https://appshunter.io/ios/app/block-builder-3d-free/id519028914/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/float-or-sink/id1419642133/reviews) |
| Number of ratings | **193** | 1 |
| Positive reviews | **79.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 47 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 39 MB | 90 MB |
| Requires iOS | **4.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ettin Entertainment I/S](https://appshunter.io/developer/512521245) | [Apps Bergman Ltda](https://appshunter.io/developer/1117417290) |

## What reviewers say

### Block Builder 3D Free

[App page](https://appshunter.io/ios/app/block-builder-3d-free/id519028914)

This app allows children to build with virtual wooden blocks, create towers, and knock them down without any mess. It offers interactive elements like RC cars, animals, and educational games such as number blocks and 2D/3D board games.

**Highlights:** Virtual wooden block building, Interactive physics-based play, Educational number blocks, Train simulation, 2D and 3D board games, Save custom constructions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $0.99 | one-time |

**What reviewers like**

- 🤩 Fun and engaging gameplay
- 💡 Encourages creativity and imagination
- 🧱 Good physics engine
- 🎮 Addictive and enjoyable
- 👨‍👩‍👧‍👦 Great for kids

**What reviewers complain about**

- 👎 Boring and repetitive gameplay
- 📉 Lacks content and features
- 🚫 Not compatible with current iOS versions
- 💸 In-app purchases lost
- 🥶 Freezes and crashes

**Reported bugs**

- App needs to work with iOS 11
- App needs to work with iOS 12.1.3
- Cylinder block causes lag
- Train and carriage move far apart
- App freezes

**Requested features**

- Update to work with current iOS
- More blocks
- Better graphics
- Static tool for blocks
- More block colors


### Float or Sink

[App page](https://appshunter.io/ios/app/float-or-sink/id1419642133)

Test your knowledge of physics by guessing if over 100 illustrated objects will float or sink. You have 10 seconds per object to make your choice, with real images to aid your decision.

**Highlights:** Over 100 objects, Illustrated objects with real images, 10-second time limit per object, Simple guessing gameplay, Suitable for all ages

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

**In-app purchases:** none


## Frequently asked questions

### Is Block Builder 3D Free free?

Block Builder 3D Free is free to download, with in-app purchases available.

### Is Float or Sink free?

Float or Sink is free to download, with no in-app purchases.

### Which has better reviews, Block Builder 3D Free or Float or Sink?

Block Builder 3D Free is rated higher. Block Builder 3D Free averages 4.1 out of 5 from 193 ratings, while Float or Sink averages 4.0 from 1 ratings.

### Do Block Builder 3D Free or Float or Sink have ads?

Float or Sink shows ads; Block Builder 3D Free does not.

### Which is updated more often, Block Builder 3D Free or Float or Sink?

Block Builder 3D Free ships an update every 5 months, and Float or Sink every 47 months. Most recently, Block Builder 3D Free was updated on November 1, 2026 and Float or Sink on November 3, 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.*