# Screw Identifier vs Thread Gauge

The clearest difference is rating: Thread Gauge at 5.0 against Screw Identifier's 3.6. Thread Gauge also leads on in-app purchases (none vs 9) and update cadence (every 6 days vs every 5 months). Screw Identifier's advantage is ratings volume (20 vs 1) and device support (3 vs 1). On price, ads and monetization model there is nothing between them.

Both are free to download. Screw Identifier sells 8 in-app purchases, starting at $4.99 per 7 days. Thread Gauge asks for nothing beyond the download.

Thread Gauge holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Screw Identifier has 20 ratings behind it against 1, so its average is the more settled of the two.

Screw Identifier ships an update every 5 months, Thread Gauge every 6 days. The most recent releases landed on September 11, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Screw Identifier | Thread Gauge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (20 ratings)](https://appshunter.io/ios/app/screw-identifier-bolt-id/id6759244718/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thread-gauge/id6781018381/reviews)** |
| Number of ratings | **20** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 52 MB | 4 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [veysel yesilmen](https://appshunter.io/developer/1801211273) | [Imad Jawad](https://appshunter.io/developer/6781018383) |

## What reviewers say

### Screw Identifier

[App page](https://appshunter.io/ios/app/screw-identifier-bolt-id/id6759244718)

Instantly identify screws, bolts, nuts, and washers using AI with a photo. Get precise specifications, measurements, and material details. Perfect for DIYers, contractors, and mechanics.

**Highlights:** AI-powered photo identification, Precise measurements and specs, Comprehensive fastener database, Smart size reference with calibration, AI assistant for fastener questions, History and report generation

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $4.99 | per 7 days |
| Get Premium Access | $4.99 | per 7 days |
| Premium Weekly | $4.99 | per 7 days |
| Premium Weekly | $5.99 | per 7 days |
| Get Premium Access | $19.99 | per year |
| Premium Yearly | $29.99 | per year |
| Premium Yearly | $39.99 | per year |
| Lifetime Access | $19.99 | 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 3.6 out of 5 from 20 ratings, while Thread Gauge averages 5.0 from 1 ratings.

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

Neither Screw Identifier nor Thread Gauge shows ads.

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

Screw Identifier ships an update every 5 months, and Thread Gauge every 6 days. Most recently, Screw Identifier was updated on September 11, 2026 and Thread Gauge on August 16, 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.*