Comparison

Screw Identifier vs Thread Gauge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Screw Identifier

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
Read full description

Identify screws, bolts, and nuts instantly with Screw Identifier – your essential fastener identification app powered by advanced AI. Perfect for DIY enthusiasts, professional mechanics, contractors, and hardware hobbyists. Identify fasteners, measure dimensions, and access detailed specifications with just a photo. Advanced AI-Powered Fastener Identification With one tap, Screw Identifier uses cutting-edge AI to deliver detailed fastener analysis. From common wood screws and machine screws to specialized bolts, nuts, washers, and threaded fasteners, this app is your go-to solution for hardware identification and measurement. Key Features: - Screw identifier with AI-powered detection - Bolt scanner with detailed measurements - Nut detector with type, size, thread pitch identification - Hardware identifier with real-time processing - Multiple fastener analysis in one image - Thread pitch and dimension readouts - Metric and imperial unit support Comprehensive Fastener Analysis The app provides detailed information: estimated measurements (length, diameter, thread pitch, head size), fastener type classification (Phillips head, hex head, flat head, pan head, socket head), standard specifications (metric M3-M10, imperial #4-#12), material and finish identification, thread identification (UNC, UNF, metric thread), and compatible tools recommendations. AI Chatbot Assistant Get expert guidance from our built-in AI assistant for fastener types, specifications, tool selection, compatibility advice, and technical guidance. Learn about fastener standards (ANSI, ISO, DIN, JIS) and get replacement part recommendations. Complete History & Reports Save all your fastener identifications, access detailed reports, export measurements and specifications, and build your own fastener record. Pro Plan Benefits: - Unlimited fastener identifications (no daily limits) - Multiple fastener analysis in one image - Detailed report access and export options - Advanced measurement tools - No ads and priority AI processing - Watermark control on shared results Perfect for DIY projects, automotive repair, construction, electronics repair, furniture assembly, woodworking, and industrial maintenance. Please note: results are AI-generated estimates. Verify critical dimensions with calipers or a thread gauge before buying or installing parts. Subscription Details: Payment will be charged to your iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renewal is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current period at the rate of your selected plan. You can manage or cancel your subscription by going to your Account Settings after purchase. End User License Agreement https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Use: https://fangfang.me/docs/app-terms-of-use Privacy Policy: https://fangfang.me/docs/app-privacy-policy

About

Thread Gauge

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
Read full description

Thread Gauge turns your iPhone into a precision thread gauge. Photograph a screw next to a common reference card, and it measures the thread's pitch and diameter, then identifies the closest matching standard — in both metric and imperial. No calipers, no thread gauge set, no guesswork. Just a photo. HOW IT WORKS Lay the screw on a plain background, parallel to a reference card: a credit or ID card (85.6 mm) or a full-size SD card. Use the light intensity slider to apply enough light to minimize shadows around the screw. Use the bubble level to find the best lighting angle — a green dot inside the circle is ideal. Move your phone closer or farther to get the sharpest focus; the sharper the image, the more precise your measurement. Snap a photo or pick one from your library, choose which card you used, and tap Measure. ThreadGauge uses the card as a known scale to compute the real-world thread pitch and major diameter. It all runs on your device — no server, no account, no tracking. Nothing you photograph ever leaves your iPhone. WHAT IT IDENTIFIES - Metric coarse and fine (M-series) - Imperial UNC and UNF - Thread pitch (mm and TPI) and major diameter - The closest standard match, with a confidence indicator When two standards are nearly identical — for example, a #10-32 and M5×0.8 — Thread Gauge flags the ambiguity so you can confirm with a physical gauge instead of trusting a borderline read. FEATURES - Metric and imperial in one tool - Tap to look up any identified size online - On-screen guidance for lighting, angle, and framing - Made for makers, machinists, mechanics, and anyone holding a mystery bolt PRICING Your first 3 measurements are free. One simple in-app purchase unlocks unlimited measurements — no subscription, ever. PRIVACY Thread Gauge collects no personal data, and your photos stay on your device. Questions or feedback? Email imad.naqqash@gmail.com

Screenshots

Screw Identifier4 screens
Thread Gauge4 screens

Verdict

The call

The clearest difference is rating: Thread Gauge at 5.0 against Screw Identifier's 4.0. Thread Gauge also leads on in-app purchases (none vs 3) and ads (none vs shown). Screw Identifier's advantage is ratings volume (19 vs 1). On price, monetization model, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Screw Identifier sells 3 in-app purchases, starting at $2.99 per 7 days. Thread Gauge asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Thread Gauge holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Screw Identifier has 19 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Screw Identifier ships an update every 4 months, Thread Gauge every 6 days. The most recent releases landed on September 11, 2026 and August 16, 2026 respectively.

Scorecard5 real differences · 5 level
Screw Identifier versus Thread Gauge: the parameters behind the verdict, then further details
ParameterScrew IdentifierThread Gauge
PriceFreeFree
Rating4.0 (19 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings19 — better1
Update frequencyEvery 4 monthsEvery 6 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhoneiPhone
Requires iOS16.4 — better17.6
Further details — not scored
Size94 MB4 MB
Age rating4+4+
DeveloperFANG FANGImad Jawad

Customer experience

Screw Identifier

All ratings19 ratings
Positive73.7%
Neutral0.0%
Negative26.3%
Written reviews5 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Thread Gauge

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Screw Identifier

Subscriptions3
  • Weekly Pro3 Days trial$2.997 Days
  • Weekly Pro$3.997 Days
  • Yearly Pro$19.991 Year
None

Thread Gauge

No in-app purchases

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 4.0 out of 5 from 19 ratings, while Thread Gauge averages 5.0 from 1 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 every 4 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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