Trying my hand at Android App Development looking for input

OK, so I got bored at work the other night and decided I would try developing an app for my android phone. Being a diabetic the first thing I thought of was a log book. I was looking around the Android Market and found bunch of log book apps and figured I need to test them out and see whats missing or could be improved upon, however I am cheap and have a tendency to be lazy when it comes to app testing (more cheap) and figured I would reach out to the community and see what you all like or dislike about these products and what it is you would like to see in a diabetes related app.

Fire away!!

oh and thanks for the input.