Comparison

Bolt Thread Identifier vs Screw Identifier

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

Head to head
About

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.

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
Read full description

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.

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

Screenshots

Bolt Thread Identifier4 screens
Screw Identifier4 screens

Verdict

The call

The clearest difference is rating: Screw Identifier at 4.0 against Bolt Thread Identifier's 2.3. Screw Identifier also leads on update cadence (every 4 months vs every 11 months) and ratings volume (19 vs 3). Bolt Thread Identifier's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price 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

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. Bolt Thread Identifier asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Screw Identifier holds the better App Store score, 4.0 against 2.3. That said, the two scores are not equally well evidenced: Screw Identifier has 19 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 33% of Bolt Thread Identifier's written reviews are positive against 0% of Screw Identifier's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Bolt Thread Identifier ships an update every 11 months, Screw Identifier every 4 months. The most recent releases landed on September 20, 2026 and September 11, 2026 respectively.

Scorecard8 real differences · 2 level
Bolt Thread Identifier versus Screw Identifier: the parameters behind the verdict, then further details
ParameterBolt Thread IdentifierScrew Identifier
PriceFreeFree
Rating2.3 (3 ratings)4.0 (19 ratings) — better
Positive reviews33.3% of reviews — better0.0% of reviews
Number of ratings319 — better
Update frequencyEvery 11 monthsEvery 4 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS26.016.4 — better
Further details — not scored
Size58 MB94 MB
Age rating4+4+
DeveloperGeared Design Consulting L.L.C.FANG FANG

Customer experience

Bolt Thread Identifier

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

Screw Identifier

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

In-app purchases

None

Bolt Thread Identifier

No 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

Questions

Is Bolt Thread Identifier free?
Bolt Thread Identifier is free to download, with no in-app purchases.
Is Screw Identifier free?
Screw Identifier is free to download, with in-app purchases available.
Which has better reviews, Bolt Thread Identifier or Screw Identifier?
Screw Identifier is rated higher. Bolt Thread Identifier averages 2.3 out of 5 from 3 ratings, while Screw Identifier averages 4.0 from 19 ratings.
Do Bolt Thread Identifier or Screw Identifier have ads?
Screw Identifier shows ads; Bolt Thread Identifier does not.
Which is updated more often, Bolt Thread Identifier or Screw Identifier?
Bolt Thread Identifier ships an update every 11 months, and Screw Identifier every 4 months. Most recently, Bolt Thread Identifier was updated on September 20, 2026 and Screw Identifier on September 11, 2026.

Other comparisons