Jedona is an Android application developed by Kappsmart that allows you to compile and run Java programs on your mobile device. It features an advanced source code editor with syntax highlighting, bracket completion, and line numbers, as well as the ability to open, save, import and share Java files. You can view program output or detailed error, and customize the editor.

However, it is important to note that an internet connection is required for compilation, and the maximum program running time is limited to 20 seconds. Additionally, some file system, network, and graphics functions may be limited. It is important to mention that this is a batch compiler, which means that interactive programs are not supported. For example, if your program provides an input prompt, you need to enter the input in the Input tab prior to compilation.

Overall, Jedona is a useful tool for Java developers who want to work on the go.