Thread Pitch Gauge is a free utility tool developed by Smart Tools Co. and is part of the first set of Smart Tools collection. This Android app eliminates the need for paper or ruler to measure the thread pitch of screws. The app is easy to use, just open it and measure the thread on your screen. The width of your screen is already calibrated, so you don't have to worry about its accuracy.

This app supports various thread sizes, including Metric, US, NPT (National Pipe Tapered thread), BSPT (British Standard Pipe Taper), Metric Screw sizes, and SAE Screw sizes. Additionally, it has a caliper mode, Meter <-> Inch conversion, and a Material design with customizable background color. If you want more tools, you can download Smart Ruler Pro and Smart Tools package. For more information, visit their blog or watch their YouTube channel.