A free app for Android, by Nikhil Vilas Donde.
DPI Conversion and DPI Checker is an easy-to-use tool that provides the user with a quick and convenient method to calculate image resolution and to check whether a particular device is capable of rendering a particular image at a given resolution. The user can also choose from a wide range of resolutions, and the results will be displayed in pixels and inches.
The user can also choose from a wide range of devices, including tablets, mobile phones, and desktop computers.
This app is a useful tool for developers to use to test their apps and to develop a better UI. It is also useful for designers to use to design a UI that is suitable for a particular device.