Being asked to write in a logbooks these days is like being asked to print out a form, fill it in, and fax it back to order something "online".
Get yourself a glucose meter that supports bluetooth and/or NFC, and it'll sync the results right to your phone. The GlucoMen Areo, for instance, will do this for you. Us diabetics should be boycotting glucose meters that don't support this stuff yet -- they're holding us back, and risking our lives with their delays.
For the meal side, check out Meal Memory (
https://play.google.com/store/apps/details?id=com.databetes.mealmemory&hl=en ), and, if they ever fix it up, Meal Scan (
http://vator.tv/news/2011-04-05-meal-scan-counts-calories-for-you ).