I have my phone unlocked, is it works best with gravity that way. With Ambi Turner, if I lock my phone will I then have to unlock it to see the notifications?
Not to see the notifications, but to get into the phone -- maybe. I cannot test because I have Device Managment software from work that prevent no locking. The locking has close to no impact on me because I am always have a BT device connected for smartlock. This way I can pick up the phone, then just swipe to unlock it.
As I think about it, if your not locked at all, your phone should behave fine. The time to lock is an Ambient Display issue, not an Ambi-Turner issue.
If you are up in the air, download and give it a try. You can get a sense of how well it will work for free. I want the Breathing function, so I will get the pro once I am convinced battery is not an issue.