# Thread Calculator vs ThreadFon Multi

The clearest difference is review sentiment: ThreadFon Multi at 80% against Thread Calculator's 33%. ThreadFon Multi also leads on ads (none vs shown) and update cadence (monthly vs every 18 months). Thread Calculator's advantage is rating (4.3 vs 3.8) and ratings volume (13 vs 4). On price, 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.

Thread Calculator holds the better App Store score, 4.3 against 3.8. Both are backed by a comparable volume of ratings — 13 and 4 respectively. Written reviews complicate that: 33% of Thread Calculator's written reviews are positive against 80% of ThreadFon Multi's, so the app with the better star average is not the one people write more warmly about.

Thread Calculator ships an update every 18 months, ThreadFon Multi monthly. Both last shipped on September 9, 2026.

## The numbers

| Metric | Thread Calculator | ThreadFon Multi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (13 ratings)](https://appshunter.io/ios/app/thread-calculator/id1559560290/reviews)** | [3.8 (4 ratings)](https://appshunter.io/ios/app/threadfon-multi-thread-calc/id1602169811/reviews) |
| Number of ratings | **13** | 4 |
| Positive reviews | 33.3% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 25 MB | 43 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GSR Gustav Stursberg GmbH](https://appshunter.io/developer/1559560292) | [Dmitriy Trofimov](https://appshunter.io/developer/1598378710) |

## 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


### ThreadFon Multi

[App page](https://appshunter.io/ios/app/threadfon-multi-thread-calc/id1602169811)

This tool provides detailed insights into metric, inch, pipe, and trapezoidal cylindrical threads based on ISO and ASME standards. It helps users efficiently determine essential thread specifications for various thread types.

**Highlights:** ISO Metric thread support, Unified Inch thread support, Pipe thread support, Trapezoidal thread support, Based on ISO 965 and ASME B1.1 standards, Determines fundamental thread parameters

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

**In-app purchases:** none


## Frequently asked questions

### Is Thread Calculator free?

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

### Is ThreadFon Multi free?

ThreadFon Multi is free to download, with no in-app purchases.

### Which has better reviews, Thread Calculator or ThreadFon Multi?

Thread Calculator is rated higher. Thread Calculator averages 4.3 out of 5 from 13 ratings, while ThreadFon Multi averages 3.8 from 4 ratings.

### Do Thread Calculator or ThreadFon Multi have ads?

Thread Calculator shows ads; ThreadFon Multi does not.

### Which is updated more often, Thread Calculator or ThreadFon Multi?

Thread Calculator ships an update every 18 months, and ThreadFon Multi monthly. Most recently, Thread Calculator was updated on September 9, 2026 and ThreadFon Multi on September 9, 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.*