# Bolt Thread Identifier vs Magnetometer Stud Finder

The clearest difference is review sentiment: Magnetometer Stud Finder at 80% against Bolt Thread Identifier's 33%. Magnetometer Stud Finder also leads on rating (3.8 vs 2.3) and ratings volume (28 vs 3). Bolt Thread Identifier's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, 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.

Magnetometer Stud Finder holds the better App Store score, 3.8 against 2.3. That said, the two scores are not equally well evidenced: Magnetometer Stud Finder has 28 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of Bolt Thread Identifier's written reviews are positive against 80% of Magnetometer Stud Finder's.

Bolt Thread Identifier ships an update every 11 months, Magnetometer Stud Finder every 7 months. The most recent releases landed on September 20, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Bolt Thread Identifier | Magnetometer Stud Finder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/bolt-thread-identifier/id6468966021/reviews) | **[3.8 (28 ratings)](https://appshunter.io/ios/app/magnetometer-stud-finder/id6504141462/reviews)** |
| Number of ratings | 3 | **28** |
| Positive reviews | 33.3% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 7 months** |
| Monetization | **Free** | Ad-supported |
| Size | 58 MB | 5 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Geared Design Consulting L.L.C.](https://appshunter.io/developer/1732325276) | [Steve Veloudos](https://appshunter.io/developer/1000253559) |

## What reviewers say

### 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


### Magnetometer Stud Finder

[App page](https://appshunter.io/ios/app/magnetometer-stud-finder/id6504141462)

This utility app leverages your device's magnetometer to detect metal objects like studs, nails, and screws within walls. It offers adjustable sensitivity settings for precise location finding, making DIY projects easier.

**Highlights:** Detect studs on walls, Accurate stud location, Adjustable sensitivity settings, Settings adjustments, Find metal objects

**In-app purchases:** none


## Frequently asked questions

### Is Bolt Thread Identifier free?

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

### Is Magnetometer Stud Finder free?

Magnetometer Stud Finder is free to download, with no in-app purchases.

### Which has better reviews, Bolt Thread Identifier or Magnetometer Stud Finder?

Magnetometer Stud Finder is rated higher. Bolt Thread Identifier averages 2.3 out of 5 from 3 ratings, while Magnetometer Stud Finder averages 3.8 from 28 ratings.

### Do Bolt Thread Identifier or Magnetometer Stud Finder have ads?

Magnetometer Stud Finder shows ads; Bolt Thread Identifier does not.

### Which is updated more often, Bolt Thread Identifier or Magnetometer Stud Finder?

Bolt Thread Identifier ships an update every 11 months, and Magnetometer Stud Finder every 7 months. Most recently, Bolt Thread Identifier was updated on September 20, 2026 and Magnetometer Stud Finder on September 23, 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.*