I appreciate developer for such application.
The idea seems to be good but when I started using this app I found out that there are some small bugs.
I hope my comment will improve this free software. I can also help the developer in coding as I am a coder too.
some suggestions which can easily be adapted are:
User interface improvement for a better eye-catching interface
buttons are too wide and narrow. Iconic (square buttons with images) are too much better.
The app lacks a simple menu which is shown when user press menu key on the phone.