Easily measure the thread pitch of various screws and bolts directly on your device's screen. This utility app calibrates automatically to your screen width for accurate measurements of metric, US, NPT, and BSPT threads.





250+ iOS apps curated and reviewed
Every iPhone needs a few good helix angle calculator apps. We benchmark 250+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | Oct 2026 | ||
| 2 | $4.99 | 1.8★ (4) | No | No | Oct 2026 | ||
| 3 | Free | 4.7★ (15) | No | Yes | Oct 2026 | ||
| 4 | Free | 3.7★ (3) | No | No | Oct 2026 | ||
| 5 | Free | — | No | No | May 2026 | ||
| 6 | Free | — | No | No | Jun 2026 | ||
| 7 | Free | 4.7★ (147) | Yes | No | Nov 2026 | ||
| 8 | Free | 4.9★ (88) | No | Yes | Nov 2026 |










Easily measure the thread pitch of various screws and bolts directly on your device's screen. This utility app calibrates automatically to your screen width for accurate measurements of metric, US, NPT, and BSPT threads.





This tool simplifies roofing calculations for professionals and DIYers. It measures roof pitch, calculates area and cost, and generates estimates. Get precise measurements for your next roofing project.