I think it was a default title, but after finally finishing an App I just realised that the name of it is "Active App"
Now, I wanted to rename the App to "Bonus Calc".
I created a new Project called "Bonus Calc" and copied the code from the "Active App" xml files, java files etc, and replaced any code that said "activeapp" with "bonuscalc", including package names etc.
I clearly renamed everything since the code is compiling and running fine on my phone.
However the name of the app in my phone is still "Active App".