Codo

The most important thing is to allow yourself to experiment and play with it. Trust me, you can't break it! One screen, some visual widgets and the basic touchscreen actions: touch, long touch.

If you can find a more basic and user friendly UI I'm looking forward to hearing about it.

You basically have a single screen app containing:

* a tiny menu section at the top (use single clicks to launch the menu - which will open the todo-browser dialog)

* the todo screen in the middle (this contains the colored checkitems for your TODO list)

* an add button at the bottom (use a short touch to add new checkitem to your TODO; use a long-touch to save the current TODO and create a new empty one)

The todo section of the screen

* is initially empty

* use the add button to insert new checkitems

* you get max 8 checkitems on a todo list

* you can touch a checkitem to change it status (from unchecked to checked)

* you get two checked states: ok-check and inverted-check (e.g. use the latter for when you attended to that item but things went bad and couldn't finish it; or just use your own imagination to come up with a use for it)

* you can continuously cycle the states of an item (checked, ok-checked, inverted-checked)
a long touch on a checkitem will show you what that todo-item on the list is about and allows you to change that information