I  like the simple interface.

The problem I have is that I take a reading whilst still in bed and hence I put the device down.

The android device is sensitive.

I have on a few occasions made button-press mistakes necessitating a re-run

1. Sometimes I have not properly pressed start - it would be good to get an audible alarm to say it is starting

2. I have inadvertently deleted a reading rather than saving it. A 'are you sure you want to delete?' message would avoid this.

Thanks for the input. I'll be sure to run this by Joel.