I found that entering something which gives a very large answer (try 69!) results in the input area being shifted off screen. It only reappeared after removing all the history (clicking on the crosses) and restarting. An annoyance, but something that be fixed by an update perhaps.

fine gui, works smooth

• "Not enough arguments. The st..." and I won't know what it's writteng next. Could that be written on two lines?

• Description is readable on the device, but in this testing page isn't. But this is not a real problem indeed... :)

App works well, but some additional keyboards controls would be welcome, as Timo suggested.

Should there be additional option to enter numbers with keyboard? Works well for me.