The more often you sync your Starling the better, but we recommend every 2-3 days for sure.
I have tried this over and over. I have updates them i have uninstalled and reinstalled i have talked to numerous ppl but it will not work. It waa doing fine the teacher one that is the student one we never could get to sync. The teacher one just quit working. I can have it right next to my phone on and charged and it still wont find it😢