# Thread Pitch Calculator vs Bolt Thread Identifier

The clearest difference is price: Bolt Thread Identifier at Free against Thread Pitch Calculator's $4.99. Bolt Thread Identifier also leads on rating (2.3 vs 1.8) and update cadence (every 11 months vs every 51 months). Thread Pitch Calculator's advantage is chart position (#192 vs unranked) and iOS requirement (12.0 vs 26.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Bolt Thread Identifier 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.

Bolt Thread Identifier holds the better App Store score, 2.3 against 1.8. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews point the same way: 17% of Thread Pitch Calculator's written reviews are positive against 33% of Bolt Thread Identifier's.

Thread Pitch Calculator ships an update every 51 months, Bolt Thread Identifier every 11 months. The most recent releases landed on September 14, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Thread Pitch Calculator | Bolt Thread Identifier |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [1.8 (4 ratings)](https://appshunter.io/ios/app/thread-pitch-calculator/id1382184074/reviews) | **[2.3 (3 ratings)](https://appshunter.io/ios/app/bolt-thread-identifier/id6468966021/reviews)** |
| Number of ratings | **4** | 3 |
| Positive reviews | 16.7% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 51 months | **Every 11 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#192** | — |
| Size | 2 MB | 58 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bhavinkumar Satashiya](https://appshunter.io/developer/1361485921) | [Geared Design Consulting L.L.C.](https://appshunter.io/developer/1732325276) |

## What reviewers say

### Thread Pitch Calculator

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

**Currently charting:** #192 Top Paid · Utilities (US App Store)

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


### Bolt Thread Identifier

[App page](https://appshunter.io/ios/app/bolt-thread-identifier/id6468966021)

Identify bolt thread pitches by taking a photo. This app uses AI to match SAE-UNC, SAE-UNF, or metric pitches after a simple distance calibration. It's a handy tool for anyone working with fasteners.

**Highlights:** Photo-based thread pitch measurement, AI-driven pitch matching, Supports SAE-UNC, SAE-UNF, and metric threads, Simple distance calibration, Useful for fabricators and mechanics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Thread Pitch Calculator free?

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

### Is Bolt Thread Identifier free?

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

### Which has better reviews, Thread Pitch Calculator or Bolt Thread Identifier?

Bolt Thread Identifier is rated higher. Thread Pitch Calculator averages 1.8 out of 5 from 4 ratings, while Bolt Thread Identifier averages 2.3 from 3 ratings.

### Do Thread Pitch Calculator or Bolt Thread Identifier have ads?

Neither Thread Pitch Calculator nor Bolt Thread Identifier shows ads.

### Which is updated more often, Thread Pitch Calculator or Bolt Thread Identifier?

Thread Pitch Calculator ships an update every 51 months, and Bolt Thread Identifier every 11 months. Most recently, Thread Pitch Calculator was updated on September 14, 2026 and Bolt Thread Identifier on September 20, 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.*