Your smartphone does not need to be on for your Miku baby monitor to work; however, your smartphone will need to be on for you to receive real-time alerts and use the Miku app.
Does my smartphone have to be on 24/7?
1 833 ASK MIKU
Mon-Fri 7AM-6PM PST
Mikucare, 6918 Melrose Ave
Los Angeles, CA 90038