All - I noticed tonight on a chat w/ Verizon that it appears that the issue with Family Base Companion app NOT being compatible with Android Marshmallow and above may be fixed. The FAQ used to say (as recently as Aug/Sept 2017):
Which devices are compatible with the FamilyBase service?
FamilyBase works with most Verizon Wireless 4G LTE and 3G mobile devices. However, it's not compatible with:
Android™ devices that use OS Marshmallow
Note: Devices that update to Marshmallow will lose the FamilyBase Companion app.
But now when I look up "Download and Install the Companion App - FamilyBase™ - Android®", I see:
The Companion app requires Android OS 6.x (and higher).
So it appears (???) that Verizon has now fixed the issue...has anyone tried this out? I just cancelled Family Base a week or two ago because of this issue, but may now try it again...