Yup, my wife and kids use it with their Gmail accounts, I use it with my MS account on my Android phone. You can also use the same accounts on desktop clients and Apple devices, so it’s not tied to a phone number. However, I’m not sure I would recommend setting it up for twin boys with ADHD (again). 😆
As someone with 7-year old, ADHD-I and AuDHD-C twins, I just have this to say: If you figure it out, please let me know!