Constantly loses connection to bulbs. Key features missing: 1. Dark mode. This is a no brainer - you turn the lights off and then have this glaring white app burning your eyes. 2. Device grouping within a room with devices able to be part of multiple groups. From what I can tell a bulb can only be in a single "room" that can be treated as a group. Overall, a fairly atrocious app that barely accomplishes what it is designed for. Definitely won't buy these bulbs anymore, thanks to this app.