Comparison

VIN Decoder Pro 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

VIN Decoder Pro

Features
Read full description

VIN Decoder Pro – Discover Everything About Your Vehicle VIN Decoder Pro provides a fast and accurate way to decode any Vehicle Identification Number (VIN). With a user-friendly interface, the app allows you to access detailed information about your car, from specifications to history. Key Features - Accurate VIN Decoding: Instantly retrieve details like manufacturer, model, year, engine type, and more. - Vehicle History Reports: Access important records, including maintenance, accidents, and ownership history (based on available data). - Support for Various Vehicle Types: Works for most vehicles worldwide, including cars, trucks, and motorcycles. - Save and Manage VINs: Easily store multiple VINs for quick access anytime. - Multi-Language Support: Available in multiple languages, including English and Vietnamese. Who Should Use VIN Decoder Pro? Car buyers looking to verify a vehicle’s origin and details. Mechanics and technicians needing quick access to technical specs. Anyone curious about their car or vehicle history. Download VIN Decoder Pro now and explore all the details about your vehicle with ease!

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

VIN Decoder Pro4 screens
Thread Gauge4 screens

Verdict

The call

The clearest difference is in-app purchases: Thread Gauge at none against VIN Decoder Pro's 2. Thread Gauge also leads on ads (none vs shown) and update cadence (every 6 days vs every 6 weeks). VIN Decoder Pro's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price 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. VIN Decoder Pro sells 2 one-off in-app purchases. Thread Gauge asks for nothing beyond the download.

UpkeepUpdate frequency

VIN Decoder Pro ships an update every 6 weeks, Thread Gauge every 6 days. The most recent releases landed on September 15, 2026 and August 16, 2026 respectively.

Scorecard5 real differences · 4 level
VIN Decoder Pro versus Thread Gauge: the parameters behind the verdict, then further details
ParameterVIN Decoder ProThread Gauge
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 6 weeksEvery 6 days — better
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.6
Further details — not scored
Size39 MB4 MB
Age rating4+4+
DeveloperTran HoaImad Jawad

In-app purchases

2 purchases

VIN Decoder Pro

One-time2
  • Donate for developer$0.99
  • PACKAGE HIDE ADS$3.99
None

Thread Gauge

No in-app purchases

Questions

Is VIN Decoder Pro free?
VIN Decoder Pro is free to download, with in-app purchases available.
Is Thread Gauge free?
Thread Gauge is free to download, with no in-app purchases.
Do VIN Decoder Pro or Thread Gauge have ads?
VIN Decoder Pro shows ads; Thread Gauge does not.
Which is updated more often, VIN Decoder Pro or Thread Gauge?
VIN Decoder Pro ships an update every 6 weeks, and Thread Gauge every 6 days. Most recently, VIN Decoder Pro was updated on September 15, 2026 and Thread Gauge on August 16, 2026.

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