# 4.2P SP vs Sheet Metal Master

The clearest difference is in-app purchases: 4.2P SP at none against Sheet Metal Master's 1. 4.2P SP also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Sheet Metal Master sells 1 in-app purchase, starting at $4.99 per month. 4.2P SP asks for nothing beyond the download.

4.2P SP ships an update every 2 months, Sheet Metal Master every 5 months. The most recent releases landed on October 7, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 4.2P SP | Sheet Metal Master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 6 MB | 7 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [健雏 何](https://appshunter.io/developer/1744074712) | [磊 高](https://appshunter.io/developer/1879509033) |

## What reviewers say

### 4.2P SP

[App page](https://appshunter.io/ios/app/42p-sp/id6502673270)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sheet Metal Master

[App page](https://appshunter.io/ios/app/sheet-metal-master/id6759945933)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SheetMetal Master | $4.99 | per month |


## Frequently asked questions

### Is 4.2P SP free?

4.2P SP is free to download, with no in-app purchases.

### Is Sheet Metal Master free?

Sheet Metal Master is free to download, with in-app purchases available.

### Do 4.2P SP or Sheet Metal Master have ads?

Neither 4.2P SP nor Sheet Metal Master shows ads.

### Which is updated more often, 4.2P SP or Sheet Metal Master?

4.2P SP ships an update every 2 months, and Sheet Metal Master every 5 months. Most recently, 4.2P SP was updated on October 7, 2026 and Sheet Metal Master on September 23, 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.*