# Thread Pitch Calculator vs SKF TraX

The clearest difference is price: SKF TraX at Free against Thread Pitch Calculator's $4.99. SKF TraX also leads on update cadence (every 2 months vs every 51 months). Thread Pitch Calculator's advantage is iOS requirement (12.0 vs 15.4). On ads, in-app purchases and device support there is nothing between them.

SKF TraX is free to download; Thread Pitch Calculator costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Thread Pitch Calculator ships an update every 51 months, SKF TraX every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Thread Pitch Calculator | SKF TraX |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[1.8 (4 ratings)](https://appshunter.io/ios/app/thread-pitch-calculator/id1382184074/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 51 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 2 MB | 18 MB |
| Requires iOS | **12.0** | 15.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [SKF](https://appshunter.io/developer/472922971) |

## What reviewers say

### Thread Pitch Calculator

[App page](https://appshunter.io/ios/app/thread-pitch-calculator/id1382184074)

Easily measure the thread pitch of various screws and bolts directly on your device's screen. This utility app calibrates automatically to your screen width for accurate measurements of metric, US, NPT, and BSPT threads.

**Highlights:** Measure thread pitch on screen, Automatic screen width calibration, Supports metric thread sizes, Supports US thread sizes, Supports NPT and BSPT threads, Measures metric screw sizes

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

**In-app purchases:** none


### SKF TraX

[App page](https://appshunter.io/ios/app/skf-trax/id1566086375)

**In-app purchases:** none


## Frequently asked questions

### Is Thread Pitch Calculator free?

Thread Pitch Calculator costs $4.99, with no in-app purchases.

### Is SKF TraX free?

SKF TraX is free to download, with no in-app purchases.

### Do Thread Pitch Calculator or SKF TraX have ads?

Neither Thread Pitch Calculator nor SKF TraX shows ads.

### Which is updated more often, Thread Pitch Calculator or SKF TraX?

Thread Pitch Calculator ships an update every 51 months, and SKF TraX every 2 months. Most recently, Thread Pitch Calculator was updated on November 2, 2026 and SKF TraX on November 3, 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.*