Bolt Thread Identifier vs Magnetometer Stud Finder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bolt Thread Identifier
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.
- 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
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Measure the thread pitch of common bolts by snapping a photo and performing a simple distance calibration. Custom AI algorithms will then return the matching SAE-UNC, SAE-UNF, or metric pitches. Fabricators, mechanics, home owners, and hobbyists in general will find the Bolt Thread Identifier App a useful addition to their tool box.
Magnetometer Stud Finder
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.
- Detect studs on walls
- Accurate stud location
- Adjustable sensitivity settings
- Settings adjustments
- Find metal objects
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The iPhone’s built-in magnetometer does allow apps to locate metal wall studs, nails, screws or any ferromagnetic material. This app uses the magnetometer to find the studs you need to locate. This app does work very well to find the studs on walls. * Easily detect studs on walls * Very accurate to find stud location * App has sensitivity settings * Also has settings adjustments This app will help you to easily find any studs on walls with your iPhone or iPad!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 August 11, 2026 respectively.
| Parameter | Bolt Thread Identifier | Magnetometer Stud Finder |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) | 3.8 (28 ratings) — better |
| Positive reviews | 33.3% of reviews | 80.0% of reviews — better |
| Number of ratings | 3 | 28 — better |
| Update frequency | Every 11 months | Every 7 months — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 58 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Geared Design Consulting L.L.C. | Steve Veloudos |
Customer experience
Bolt Thread Identifier
Magnetometer Stud Finder
In-app purchases
Bolt Thread Identifier
No in-app purchases
Magnetometer Stud Finder
No in-app purchases
Questions
Is Bolt Thread Identifier free?
Is Magnetometer Stud Finder free?
Which has better reviews, Bolt Thread Identifier or Magnetometer Stud Finder?
Do Bolt Thread Identifier or Magnetometer Stud Finder have ads?
Which is updated more often, Bolt Thread Identifier or Magnetometer Stud Finder?
Other comparisons
