Viant has been great for us, works well but we hav...

Viant has been great for us, works well but we have had it at least 4 years or maybe more. At the time we got it we did not have smart phones so didn't need the info about using it with the phones. Now we do so would like some information on how to set things up with our phones please.
Update 07/03/2019
We have had the doorbell camera about 6 to 10 months, is great & works so well with our smart phones!!