”Find phone" call your phone.\nYou can look for the smart-phone in the bag or other.
Your smart-phone sounds a ringtone when you tap Find-phone.
Find-phone is useful even while the smart-phone was lock or sleep.

Notice: Find-phone require connected smart-phone and Smart-watch by Buletooth, because Smart-Watch extension is ran on smart-phone.
I recommend Android Device Manager when if smart-watch disconnected to smart-phone.

This is free version.
Professional version is:
・No ad.(It mean you may not allow internet.)
・Custom ringtone.