If I use the link "https://www.verizonwireless.com/solutions-and-services/call-filter/" and then "Get it Now", I get a popup message that says one of the devices on my account is not compatible.
If I try by going to the web page for Add-ons, I can select the free option, however I cannot select the Samsung S10 on line ending 01. I can select the iPhone on line 00.
If I check the list of supported devices, both the Samsung S10 and the iPhone are supported devices.
If I download the app from the Google store to my S10, the only option available is to subscribe for $2.99/month.