Hello Matthew!
The app looks great so far. I've got a feature proposition. Maybe instead of choosing only one goal to track during the day, it would be possible to track the day as a whole and by pressing + (plus) or - (minus) you could add a short note like 'tv' or 'food' or whatever else. So that when you look on results after export you see which things got you distracted and when it happened. It would perhaps give a broader view of where you win or loose during the day.