This won't apply to everyone but I use the app frequently to turn data on and off for my kids phones. It is so extremely slow to load information. Periods where data usage controls are not accessible. The way in which you access the usage screen changes frequently. For the last several days the app won't even load and I've had to use the website instead. I even tried clearing cache, deleting data, and re-installing the app and still can't get the app to fully launch after signing in.