What is a project?
Contrary to basic audio recording applications where just one audio file is being processed, Audio Evolution Mobile Studio needs to keep track of a lot more: multiple audio and MIDI clips on several tracks, mixer settings, automation settings, effects and their parameters, tempo, etc. All this information is kept in a project. You can save and later on load projects such that all the mixer settings, recordings and edits you have made are not lost.
When you start the app, you will be presented with an empty 'Untitled' project. In a lot of software, you need to create and name a project first and do some basic set-up before you can start recording. We feel that this can block creativity, for example when you just had a spontaneous idea in your mind that you would like to record directly. In Audio Evolution Mobile Studio, you can just start the app and press record. This recording would become part of this Untitled project, which is numbered like 'Untitled003'. When you save an Untitled project, it will be renamed. If you are not pressed for time however, you can also start by selecting 'New project' from the Project menu and give it a name of your choice. To keep things organized, you should create a project for every song.
When a project is created, a folder with the project's name is added to the 'Projects' sub folder of the app. In this folder, a sub folder 'Samples' is added as well where all your subsequent audio recordings will be stored (likely as .WAV files). A project folder then contains one or more project files (ending in .prj). A project file contains things like MIDI events, project settings, automation, and references to the audio data in the Samples sub folder. It does NOT contain any audio data itself!
Since you could have different variations of a song, for example different mixes, you can save them as separate project files. Since they would all belong to the same song, they are stored next to each other in the same project's folder.
The app also periodically and automatically saves up to 5 project files as back-ups in your project's folder. They are called 'Autosave0.prj' to 'Autosave4.prj'. In the unfortunate event that the app would crash or you forget to save, please look at the time stamps of these projects to retrieve your last edited work. Since the app auto-saves every 3 minutes by default (when an edit has occurred), you are unlikely to ever lose a lot of work. Recordings are also written/stored directly to a file during recording, so there is no need (or even a way) to save recordings since that is always done automatically.