Mech Measurement and Metrology is a free Android application developed by Ceyone Apps that provides a detailed explanation of mechanical measuring instruments. The app is categorized under Education & Reference and covers a wide range of instruments used for linear, angular, and surface measurements.

The app is divided into different sections based on the type of measurement. The linear measurement section covers both non-precision and precision instruments, such as steel rules, calipers, micrometers, and depth gauges. The angular measurement section explains the use of protractors, bevel gauges, and autocollimators, among others. The surface measurement section describes the use of straight edges, surface plates, and profilometers.

Each instrument is explained in detail with theory and images, making it easier for users to understand how to use them. The app also includes a brief history of each instrument, which adds to its educational value. However, the app lacks interactive features or quizzes to test the user's knowledge.

Overall, Mech Measurement and Metrology is a useful app for anyone who wants to learn about mechanical measuring instruments. Its comprehensive coverage of different instruments and easy-to-understand explanations make it a valuable addition to the field of education and reference applications on the Google Play Store.