# Thread Calculator vs Metal +

The clearest difference is in-app purchases: Thread Calculator at none against Metal +'s 1. Metal +'s advantage is ads (none vs shown) and rating (4.7 vs 4.3). On price, ratings volume and device support there is nothing between them.

Both are free to download. Metal + sells 1 one-off in-app purchase. Thread Calculator asks for nothing beyond the download.

Metal + holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 13 and 11 respectively.

Thread Calculator ships an update every 18 months, Metal + every 4 months. The most recent releases landed on September 27, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Thread Calculator | Metal + |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (13 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews) | **[4.7 (11 ratings)](https://appshunter.io/ios/app/metal-plus/id6446039096/reviews)** |
| Number of ratings | **13** | 11 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Every 4 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 25 MB | 5 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) | [Mohamed Saad](https://appshunter.io/developer/1291109619) |

## What reviewers say

### 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


### Metal +

[App page](https://appshunter.io/ios/app/metal-plus/id6446039096)

Easily calculate the weight and price of various metal forms and alloys. Save your projects and access calculations offline. This tool supports multiple units and metal types for precise results.

**Highlights:** Calculate weight of round, sheet, tube, rectangle forms, Supports steel, aluminum, nickel, copper, gold, silver alloys, Calculate paint surface area, Weight converter, Price per kilogram/ton converter, Save items and projects, Offline functionality

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Thread Calculator free?

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

### Is Metal + free?

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

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

Metal + is rated higher. Thread Calculator averages 4.3 out of 5 from 13 ratings, while Metal + averages 4.7 from 11 ratings.

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

Thread Calculator shows ads; Metal + does not.

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

Thread Calculator ships an update every 18 months, and Metal + every 4 months. Most recently, Thread Calculator was updated on September 27, 2026 and Metal + on September 30, 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.*