I use mySugr and love it. I'm T1 and it's great for recording everything, but you can 'hide' the insulin sections in the settings and just use it for bloods and food. It's great for recording what else you were doing that may affect your blood sugars, like exercise, stress or illness, and are able to then search for those 'tags' so you know what to expect next time. You can also add photos of your plate so you can see what size portion you ate. It is also able to 'scan' your result from your glucose monitor if you have the right kind (it works on quite a lot I think) which saves you entering all the details
Any T1's, or T2's on insulin, reading this - it has a great little bolus calculator integrated too.