The apps are pretty good but it's stupid when the transmitter disconnects and you have to type in the SN again. But due to the SN being on the bottom of the transmitter and no way to take it off without destroying your sensor you have to waste the product which costs hundreds of dollars! I'll be switching to freestyle after this. The cost is high, design is bad. Innovation is supposed to make things better and they've made it worse. Two stars for a good app minus 3 stars for the products.