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, 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
Read full description

Instantly identify screws, bolts, nuts, and washers with just a photo. Screw Identifier uses advanced AI to analyze any fastener and deliver precise specifications in seconds. Whether you are a DIY enthusiast, professional contractor, mechanic, or hardware store employee, this app eliminates the guesswork from fastener identification. INSTANT AI IDENTIFICATION - Snap a photo of any screw, bolt, nut, or washer - Get instant AI-powered identification with high accuracy - Identify multiple fasteners in a single image - Works with both metric and imperial fasteners PRECISE MEASUREMENTS & SPECS - Exact length, diameter, and thread pitch - Head type classification (Phillips, hex, flat, Torx, socket, pan) - Thread standard detection (UNC, UNF, metric coarse, metric fine) - Material and finish identification (stainless steel, zinc, brass) - Drive type recognition COMPREHENSIVE FASTENER DATABASE - Screws: wood screws, machine screws, self-tapping, drywall, deck screws - Bolts: hex bolts, carriage bolts, lag bolts, eye bolts, U-bolts - Nuts: hex nuts, lock nuts, wing nuts, cap nuts, flange nuts - Washers: flat washers, lock washers, fender washers, spring washers - Plus: rivets, anchors, pins, and specialty fasteners SMART SIZE REFERENCE - Use a coin or ruler as reference for accurate measurements - Automatic scale calibration - Size comparison charts included AI ASSISTANT - Ask any question about fasteners and get expert answers - Tool compatibility recommendations - Torque specifications and installation tips - Material selection guidance HISTORY & REPORTS - Save all your scans in organized history - Generate detailed PDF reports - Share specifications with colleagues - Build your fastener collection library PERFECT FOR - DIY home improvement projects - Professional contractors and builders - Auto mechanics and repair shops - Hardware store employees - Plumbers and electricians - Furniture assembly - Industrial maintenance - Engineering and manufacturing SUBSCRIPTION OPTIONS - Weekly subscription with auto-renewal - Lifetime access with one-time purchase Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Privacy Policy: https://sites.google.com/view/screwidentifier-boltsize/ana-sayfa Terms of Use: https://sites.google.com/view/screw-identifier-bolt-size/ana-sayfa

Screenshots

Bolt Thread Identifier4 screens
Screw Identifier4 screens

Verdict

The call

The clearest difference is rating: Screw Identifier at 3.6 against Bolt Thread Identifier's 2.3. Screw Identifier also leads on update cadence (every 5 months vs every 11 months) and ratings volume (20 vs 3). Bolt Thread Identifier's advantage is in-app purchases (none vs 9) and review sentiment (33% vs 0%). On price, ads 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 8 in-app purchases, starting at $4.99 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, 3.6 against 2.3. That said, the two scores are not equally well evidenced: Screw Identifier has 20 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 5 months. The most recent releases landed on September 20, 2026 and September 11, 2026 respectively.

Scorecard7 real differences · 3 level
Bolt Thread Identifier versus Screw Identifier: the parameters behind the verdict, then further details
ParameterBolt Thread IdentifierScrew Identifier
PriceFreeFree
Rating2.3 (3 ratings)3.6 (20 ratings) — better
Positive reviews33.3% of reviews — better0.0% of reviews
Number of ratings320 — better
Update frequencyEvery 11 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size58 MB52 MB
Age rating4+4+
DeveloperGeared Design Consulting L.L.C.veysel yesilmen

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 ratings20 ratings
Positive65.0%
Neutral5.0%
Negative30.0%
Written reviews8 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Bolt Thread Identifier

No in-app purchases

8 purchases

Screw Identifier

Subscriptions7
  • Weekly Access$4.997 Days
  • Get Premium Access7 Days trial$4.997 Days
  • Premium Weekly3 Days trial$4.997 Days
Show 4 more
  • Premium Weekly7 Days trial$5.997 Days
  • Get Premium Access$19.991 Year
  • Premium Yearly3 Days trial$29.991 Year
  • Premium Yearly3 Days trial2 variants$39.991 Year
One-time1
  • Lifetime Access$19.99

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 3.6 from 20 ratings.
Do Bolt Thread Identifier or Screw Identifier have ads?
Neither Bolt Thread Identifier nor Screw Identifier shows ads.
Which is updated more often, Bolt Thread Identifier or Screw Identifier?
Bolt Thread Identifier ships an update every 11 months, and Screw Identifier every 5 months. Most recently, Bolt Thread Identifier was updated on September 20, 2026 and Screw Identifier on September 11, 2026.

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