So the main feature of this app is to calculate averages, but you can’t calculate the average of decimals, because there is no such feature. One thing that could be added is just a simple button that adds on a decimal to the number being inputed.
Another thing is the auto-enter feature. You press either 10, 100, or 1000, and when you press one of these buttons, the app will automatically enter in the the number when it is at a certain digit count. A way to improve this feature is to add a way to switch the auto-enter feature on and off, and when you hit “on,” you are brought to a menu asking you which auto-enter mode you want. Of course, with the toggle-able auto-enter feature, when you turn auto-enter off, an “enter” button is presented, and when pressed, enters the information.
One last thing you can do is add a negative button which, of course, switches the number to a negative number.
All in all, this is a good app, but adding these things will make this app even better.