Delivery of the "bolus insulin" happens when the meal is calculated 20 minutes before it's eaten. This is done manually, you have to figure the number (grams of

Delivery of the "bolus insulin" happens when the meal is calculated 20 minutes before it's eaten. This is done manually, you have to figure the number (grams of carb) put the number in to a special screen (press a button to access) and confirm (three more steps) and it buzzes and says "delivered" at the end of the process. If you don't eat your meal then the bolus is active and I guess that there are problems, this hasn't happened for us yet. In the background the system delivers basal insulin - this is a low dose of insulin that is used by the app to manage glucose levels. The sensor shows the level, the app makes a prediction and then delivers insulin (or decides not to) in order to keep within limits. Sometimes she can go low or high (below 4 or over 7) when she goes low sometimes she has to eat sweets, when high sometimes engage "boost" mode. There is also an "ease off" feature that she engages to tell the system to expect a low insulin period; for example before playing sport. The drawback of having a sensor is that you get alarms. The benefit is that you know what is happening and can act. The Camaps system with the always on pump means that you get relatively few alarms or overshoots. She is in bounds for a much improved amount of time (I think 95+% vs <70% before), also the over/undershoots are smaller and more quickly managed (I have no stat, but I have seen the data and believe this to be so). My daughter is nearly 12 and is able to manage this independently. It's certainly much easier for her than the injections were. I think that as a parent or school this would be much easier to manage for a smaller child - you would have to not give them the password for the phone of course! I'm no expert but I expect that there would be a lower limit for when the app will work because little kids are so different - but I don't know.