I have been using the August Smart lock for a few months now, and on paper, it's been great.
However, more often than not, guests show up at my door without having downloaded the app, much less created an account. August sends an email to all of my guests, but the majority tell me they've never seen it.
As a result, I'm left to guide them through the process of app installation and set up after letting them in. Not a HUGE problem. But, it kind of defeats the purpose of getting a smart lock.
What have you guys done to encourage your guests to "come prepared".