# Thrrread Go: Thread & Bolt — Threads, tap drills & bolts > Fastener thread identification and reference tool for professionals and hobbyists. (iPhone/iPad app by Tomoya Kajiwara.) - Source: https://appshunter.io/ios/app/thrrread-go-thread-and-bolt/id6796997797 (this page in markdown: same URL + `.md`) - Developer: [Tomoya Kajiwara](https://appshunter.io/developer/6795143711) - Category: Reference, Utilities - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 15.1 · 39 MB - Languages: American English, French (France), German (Germany), Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish - Released: 2026-08-06 - Data updated: 2026-09-12 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/thrrread-go-thread-and-bolt/id6796997797/reviews.md ## What is Thrrread Go? Not sure which thread you have? Start with a photo and real measurements. Measure the thread pitch on a photo, combine it with the outside diameter you measured, and narrow the result to likely standards. Thrrread Go does not pretend a photo alone can identify a fastener—it gives you a practical shortlist to verify. Once you have candidates, check thread dimensions, tap-drill sizes, clearance holes, fastener head dimensions, nuts, washers and counterbores without jumping between tables. It is built for the workshop, DIY, design, machining and maintenance. USE THRRREAD GO WHEN YOU WANT TO • Identify likely standards for a thread in your hand • Check metric, inch and pipe-thread differences • Find a tap-drill size before machining • Review bolt-head and counterbore dimensions • Compare two candidates side by side WHAT YOU CAN DO • Search by standard, nominal size, pitch or legacy designation • Find likely matches from measured diameter and pitch/TPI • Measure pitch on a photo and combine it with the outside diameter (one-time purchase) • Compare two threads or two bolts, including dimensions and strength classes • Browse design applications and compatible thread combinations • Switch mm/inch, save favorites, revisit history and use the calculator INCLUDED REFERENCES Metric coarse and fine threads; UNC, UNF and UNEF; Whitworth W; R, Rc, Rp, G and NPT pipe threads; thread-insert pilot holes; fastener head dimensions; hex nuts; plain washers; and counterbore reference dimensions. No account is required. Core search and reference features work offline. Photos and measurements, favorites, history and settings remain on the device. The free and referral-code editions show non-personalized Google AdMob banners outside the Calculator. The one-time purchase unlocks photo pitch measurement and special threads, and removes banner ads. Optional Amazon product-search links appear on some reference pages. Data and candidate matches are reference information. Before use, verify the current official standard, drawing, actual part, and tool or supplier documentation. ## Key features - Identify threads from photos and measurements - Access tap-drill sizes - Compare thread dimensions - Browse fastener head dimensions - Offline core functionality - Metric and inch thread support ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Special Threads – No Ads | $5.99 | one-time | | Referral Edition (With Ads) | $5.99 | one-time | ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/thrrread-go-thread-and-bolt/id6796997797/reviews.md ### 5/5 — こんなアプリ欲しかった！ *2026-08-31* ねじで、迷うことが減りました。 治具作りなどでも、ネジとボルトなどすぐに切り替えできて便利です。 ### 5/5 — 使いやすい *2026-08-07* 見やすくて使いやすいです。 ## Frequently asked questions about Thrrread Go ### How does Thrrread Go identify threads? Thrrread Go allows you to measure the thread pitch from a photo and combine it with the outside diameter you measured. This helps narrow down the results to likely standards, providing a practical shortlist for verification. ### Can Thrrread Go identify threads from a photo alone? No, Thrrread Go does not claim a photo alone can identify a fastener. It uses a photo for pitch measurement and requires your measured outside diameter to provide likely candidates. ### What types of threads does Thrrread Go include? Thrrread Go includes references for metric coarse and fine threads, UNC, UNF, UNEF, Whitworth W, and pipe threads like R, Rc, Rp, G, and NPT. It also covers thread-insert pilot holes. ### Does Thrrread Go work offline? Yes, the core search and reference features of Thrrread Go work offline. Photos, measurements, favorites, history, and settings are saved on your device. ### What is the one-time purchase in Thrrread Go? The one-time purchase in Thrrread Go unlocks the ability to measure pitch from a photo, includes special threads, and removes banner ads. It is priced at a one-time purchase. ### Does Thrrread Go have ads? Yes, the free edition of Thrrread Go shows non-personalized Google AdMob banners outside the Calculator. The one-time purchase removes these banner ads. ### What devices is Thrrread Go available on? Thrrread Go is supported on iPhone and iPod devices. It is designed for iOS. ### How often is Thrrread Go updated? The latest version of Thrrread Go is 1.0.4, last updated on August 27, 2026. Updates typically include new features, bug fixes, and reference data enhancements. ## Version history (last 5 releases) ### 1.0.6 — 2026-09-07 Improved thread-standard search, bolt dimension diagrams, use-case search, unit conversion, comparison, and photo-based pitch measurement. This update also refines display stability and localized text. ### 1.0.5 — 2026-09-01 Restored access to Apple's official promotion-code redemption from Settings. The secure Store code-entry screen remains available while the app-specific referral system is disabled. This update also includes stability improvements. ### 1.0.4 — 2026-08-27 Improved thread and bolt references for engineering work. • Switch directly between coarse and fine pitch from the detail screen. • Clearer Thread Standards and Bolt Dimensions navigation, angle diagrams, and favorites. • Added low-head bolt tightening guidance and improved comparison-table readability. ### 1.0.3 — 2026-08-25 Security and stability improvements. • Temporarily disabled the app-specific promotion-code entry and sharing feature while its anti-abuse protection is redesigned. • Strengthened network input validation and updated dependencies. • Thread search, photo pitch measurement, calculations, and one-time purchase and restore remain available. ### 1.0.2 — 2026-08-24 New • Added Japanese, English, German, Spanish, French, Simplified Chinese, Korean and Brazilian Portuguese, grouped under one Language settings item. • Measure pitch from a photo: photograph a thread, then convert the crest spacing into pitch using the major diameter you measured, and see the closest standards. Measurement happens on your device and the image is never sent anywhere. • Thread-insert (STI) conversion: tap sizes and reference drills for metric, number and fractional-inch sizes (paid edition). • Thread trivia: commonly confused designations such as PT/PS, UNC/UNF and UNJ, organised by standard and reachable from search. • Calculated reference values for uncataloged sizes: search a size like “M54×1.5” (diameter × pitch) to see reference dimensions derived from the basic thread form (large M, Tr and MJ in the paid edition). Improved • Measure pitch from a photo: pitch can now always be converted by aligning the measurement lines manually, even when automatic reading has low confidence. The purchase screen also lists exactly what the paid edition adds. • More accurate candidates when searching by a measured major diameter, allowing for the fact that external threads measure slightly under the nominal size. • Fixed a flicker that appeared during the back swipe. • Fixed truncated dimension values and clarified that 1:16 is a diameter taper. • Fixed the Thread Trivia category layout. • Removed the dedicated tapping- and wood-screw page. • Removed the unclear down-arrow control beside the promotion-code field. ## More apps by Tomoya Kajiwara - [おてつだいステップUP](https://appshunter.io/ios/app/up/id6795143709) - [RUSH//COMMAND](https://appshunter.io/ios/app/rushcommand/id6797495427) - [おでかけ逆算](https://appshunter.io/ios/app/id6799693227) All apps by Tomoya Kajiwara: https://appshunter.io/developer/6795143711 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-12.*