Bugjaeger is a tool that was developed to make the life of Android developers easier. With it, you can perform many tasks on your device that generally need to be done on a computer.
For instance, you can use this tool to take a screenshot and even access your SD card directly from your phone. And since it's a tool that Android developers use, it can also help you understand the inner working of your Android device.
To take a screenshot, you just need to open the app, select the desired option, connect your device via USB, and choose the file you want to save. You can save it in the default Android screenshot directory or a different directory on your device.
And to take a photo, you just need to take a screenshot and then save it in the desired format.
To do all these things, you don't need any special skills or knowledge; you just need to install and use the tool.