# Metal World vs Thread Calculator

The clearest difference is review sentiment: Metal World at 100% against Thread Calculator's 33%. Metal World also leads on ads (none vs shown) and rating (4.8 vs 4.4). On price, ratings volume, 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.

Metal World holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 5 and 14 respectively. Written reviews point the same way: 100% of Metal World's written reviews are positive against 33% of Thread Calculator's.

Metal World ships an update every 2 months, Thread Calculator every 18 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Metal World | Thread Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/metal-world/id480664274/reviews)** | [4.4 (14 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews) |
| Number of ratings | 5 | **14** |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 18 months |
| Monetization | **Free** | Ad-supported |
| Size | 37 MB | 25 MB |
| Requires iOS | **5.1.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BIKAR-METALLE GmbH](https://appshunter.io/developer/480664277) | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) |

## What reviewers say

### Metal World

[App page](https://appshunter.io/ios/app/metal-world/id480664274)

Quickly calculate the weight of various metal and plastic materials in numerous formats. Supports nearly 300 materials and 22 shapes, providing results per unit or total weight. Also offers material comparison and specific weight displays.

**Highlights:** Weight calculation for ~300 materials, Supports 22 formats (sheets, bars, tubes, etc.), Results per kg/m, m², or item, Specific weight display, Material comparison with EN/DIN standards, Information on special materials

**Features:** macOS Compatibility

**In-app purchases:** none


### Thread Calculator

[App page](https://appshunter.io/ios/app/thread-calculator/id1559560290)

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.

**Highlights:** Thread cutting calculator for multiple units, Cold forming calculator, Thread repair calculator, Tap hole and bolt diameter calculation, Saves time compared to tables

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Metal World free?

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

### Is Thread Calculator free?

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

### Which has better reviews, Metal World or Thread Calculator?

Metal World is rated higher. Metal World averages 4.8 out of 5 from 5 ratings, while Thread Calculator averages 4.4 from 14 ratings.

### Do Metal World or Thread Calculator have ads?

Thread Calculator shows ads; Metal World does not.

### Which is updated more often, Metal World or Thread Calculator?

Metal World ships an update every 2 months, and Thread Calculator every 18 months. Most recently, Metal World was updated on October 20, 2026 and Thread Calculator on October 24, 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.*