# Dr. Block vs Screw Blast

The clearest difference is in-app purchases: Dr. Block at none against Screw Blast's 9. Dr. Block also leads on iOS requirement (10.0 vs 12.0). Screw Blast's advantage is update cadence (every 2 months vs every 8 months). On price, ads and device support there is nothing between them.

Both are free to download. Screw Blast sells 9 one-off in-app purchases. Dr. Block asks for nothing beyond the download.

Dr. Block ships an update every 8 months, Screw Blast every 2 months. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Dr. Block | Screw Blast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/screw-blast-sort-nuts/id6744590867/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 8 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 31 MB | 90 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SUD Inc.](https://appshunter.io/developer/453469451) | [Beijing New Vision Real Estate Development Co., Ltd.](https://appshunter.io/developer/1304342445) |

## What reviewers say

### Dr. Block

[App page](https://appshunter.io/ios/app/dr-block/id1489855738)

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

**In-app purchases:** none


### Screw Blast

[App page](https://appshunter.io/ios/app/screw-blast-sort-nuts/id6744590867)

Engage your mind with a creative and strategic puzzle game. Solve intricate screw and pin arrangements to earn rewards and experience a sense of accomplishment. Offers diverse levels that blend logic and imagination for a satisfying challenge.

**Highlights:** Spatial imagination and strategic planning, Complex screw and pin puzzles, Scoring and reward system, Diverse level designs, Logic and creativity combination, Intuitive interface

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coin Pack 1 | $1.99 | one-time |
| Coin Pack 2 | $7.99 | one-time |
| Little Pack | $9.99 | one-time |
| Coin Pack 3 | $14.99 | one-time |
| Big Pack | $19.99 | one-time |
| Coin Pack 4 | $29.99 | one-time |
| Large Pack | $39.99 | one-time |
| Coin Pack 5 | $54.99 | one-time |
| Coin Pack 6 | $99.99 | one-time |


## Frequently asked questions

### Is Dr. Block free?

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

### Is Screw Blast free?

Screw Blast is free to download, with in-app purchases available.

### Do Dr. Block or Screw Blast have ads?

Both Dr. Block and Screw Blast show ads.

### Which is updated more often, Dr. Block or Screw Blast?

Dr. Block ships an update every 8 months, and Screw Blast every 2 months. Most recently, Dr. Block was updated on October 8, 2026 and Screw Blast 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.*