Simple to use and useful - but...
I have been using this app for 4 months now and found it easy to use, not over complicated like many that try and do too many things at the same time. It is encouraging to see my progress over time, as I cut down the units! However, the most recent update has interfered with the display for the current week, so even though I have entered the data, it is not showing either on the diary or on the statistics. I hope they solve this problem soon. Otherwise, recommended.