I think the Libre itself is fantastic but as far as the link is concerned I think it is just a waste of time as it stands. Firstly you are relying on the person the other end to scan (whether it be teenager, child's carer, whoever). If they do not scan you do not know so not really useful. So they scan and see they are going low rapidly - exactly the same time as you see it, provided you have had your nose to your phone constantly every second. However even if you see it the same time as they do, hopefully by the time you get to contact them about it they would have done something about it. Can you see - teenage daughter at dance several miles away. She scans and sees she is going very low. You see it so phone her immediately to tell her. She replies "For goodness sake Mum I know, I have just scanned and have seen and am already drinking a glass of orange juice and munching into a packet of crisps". What if you had nodded off and saw it half an hour later. Your panic and stress would go right up, and not do you any good. What do you do?. Phone and ask if she is OK and all you will know is that she is OK. How does it make life better for knowing at that moment she had a hypo but was now OK any more than knowing later when she got home that she had a hypo but was now OK. Same with a younger child. If they were not capable of sorting themselves out then they would be with a responsible adult. The adult would scan and also deal with any lows or highs there and then, hopefully not waiting on the parent to contact them to tell them to. What if it goes wrong, what if you have taken your eyes off your phone for five minutes at the wrong time, what if you lose a signal. Hopefully your child will not be relying on you to tell them that their blood glucose is going low or high before they do something about it, as you would not know any quicker than they do. You cannot be watching your smartphone every second of every day and night, especially if you have to work. So I agree with Sally, as it stands I do not think the smartphone link is that useful. I am talking about the link here not the Libre itself.