App Inspector is a free Android utility and tool developed by UBQSoft. With this app, you can inspect the detailed information of all the apps installed on your device. It shows the permissions used by each app, orders them by install time and usage, and even allows you to extract and download the APK file from installed applications.

App Inspector provides a wealth of information about your installed apps, including their package name and version, installation and update dates, package file path, target SDK version, package size, and usage time over the past week. You can also see which permissions each app has been granted or denied and which engine or framework it uses (such as Unity 3D, Adobe AIR, Cocos2d, Xamarin, yoyogames GAMEMAKER, or Unreal Engine 4). Additionally, App Inspector displays the Java libraries used by each app.

Overall, App Inspector is a useful tool for anyone who wants to know more about the apps installed on their device. If you encounter any bugs or have feature requests, you can submit them on the developer's GitHub page.