As an adult, I use a GCM manufactured by Abbott, which allows for scanning and recording data, charts etc. I inject appropriate insulin dosage after reading the GCM scan. The software and hardware are proprietary for use with IOS. The package is very effective and accurate, and very expensive if you consider how much insulin, needles and the consumable GCM cost together. It works and I have been able to get very good, tight control using their system. Until OS software and hardware catch-up, this might be a good intermediate step for those who can afford it. Pumps are always going to be problematic until they are simple enough for youth to understand and maintain them, since most Type 1s start out at a young age being insulin dependant.