# Screw Identifier vs Thread Gauge

The clearest difference is rating: Thread Gauge at 5.0 against Screw Identifier's 4.1. Thread Gauge also leads on in-app purchases (none vs 5) and ads (none vs shown). Screw Identifier's advantage is ratings volume (23 vs 2). On price, monetization model, device support and iOS requirement there is nothing between them.

Both are free to download. Screw Identifier sells 5 in-app purchases, starting at $2.99 per 7 days. Thread Gauge asks for nothing beyond the download.

Thread Gauge holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Screw Identifier has 23 ratings behind it against 2, so its average is the more settled of the two.

Screw Identifier ships an update monthly, Thread Gauge every 6 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Screw Identifier | Thread Gauge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (23 ratings)](https://appshunter.io/ios/app/screw-identifier-fastener-id/id6751171399/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/thread-gauge/id6781018381/reviews)** |
| Number of ratings | **23** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 101 MB | 4 MB |
| Requires iOS | **16.4** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [FANG FANG](https://appshunter.io/developer/1833796784) | [Imad Jawad](https://appshunter.io/developer/6781018383) |

## What reviewers say

### Screw Identifier

[App page](https://appshunter.io/ios/app/screw-identifier-fastener-id/id6751171399)

Instantly identify screws, bolts, and nuts using AI. Measure dimensions, access detailed specifications, and get expert guidance from a chatbot. Ideal for DIYers, mechanics, and hobbyists.

**Highlights:** AI-powered fastener identification, Precise measurement with ruler reference, Detailed specifications (type, size, material), AI chatbot for expert guidance, Scan history and reports, Intuitive interface

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $2.99 | per 7 days |
| Weekly Pro | $3.99 | per 7 days |
| Annual Pro | $19.99 | per year |
| Yearly Pro | $19.99 | per year |
| Lifetime Pro | $29.99 | one-time |


### Thread Gauge

[App page](https://appshunter.io/ios/app/thread-gauge/id6781018381)

This app transforms your iPhone into a precise thread measurement tool. Simply photograph a screw next to a reference card to accurately determine its pitch and diameter, identifying the closest standard in both metric and imperial units.

**Highlights:** Measures metric and imperial threads, Identifies closest standard match, Uses reference card for scale, On-screen guidance for photography, Offline processing, no data tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Screw Identifier free?

Screw Identifier is free to download, with in-app purchases available.

### Is Thread Gauge free?

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

### Which has better reviews, Screw Identifier or Thread Gauge?

Thread Gauge is rated higher. Screw Identifier averages 4.1 out of 5 from 23 ratings, while Thread Gauge averages 5.0 from 2 ratings.

### Do Screw Identifier or Thread Gauge have ads?

Screw Identifier shows ads; Thread Gauge does not.

### Which is updated more often, Screw Identifier or Thread Gauge?

Screw Identifier ships an update monthly, and Thread Gauge every 6 days. Most recently, Screw Identifier was updated on October 25, 2026 and Thread Gauge 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.*