Screw Pitch Gauge

Quickly check screw thread pitch with your iPhone. Includes 21 metric and 27 inch (TPI) scales, plus a built-in ruler with calibration. Perfect for DIY and repairs.

A simple and precise tool to measure thread pitch directly on your iPhone or iPad screen.

Whether you're fixing your bike, repairing furniture, or doing home DIY, identifying the correct screw thread is essential. This app turns your screen into a digital screw pitch gauge — no physical tools required!

• Features

• 21 Metric Thread Sizes
  • Includes pitches from 0.25 mm to 3.0 mm
  • Clearly drawn zigzag thread shapes for easy matching
• 27 Imperial Thread Sizes (TPI)
  • Covers from 6 TPI to 80 TPI
  • Converts TPI to precise inch-based pitch automatically
• Built-in Ruler
  • Measure screw length and outer diameter in mm or inches
  • Supports calibration using a credit card, A4 paper, or any known-length object
• Calibrate Your Screen
  • Adjust scaling easily to match your specific device and ensure accurate measurements
• DIY Friendly
  • Designed for everyday users, not just professionals
  • Perfect for bike repair, hobby projects, and household fixes
• Minimal Ads
  • Only a small banner at the bottom — no full-screen ads, no interruptions

• Why Use This App?

• Save time guessing thread types or searching for your physical gauge
• Works even when you’re outdoors or on-the-go
• Avoid costly mistakes by choosing the right screw size the first time

• Device Support

• iPhone: Landscape mode only
• iPad: All orientations supported (portrait, landscape, etc.)

Free, simple, and accurate — made for those who want to get the job done without hassle. Try it now and turn your iPhone or iPad into a smart, pocket-size thread checker.