Each home has its own items, maintenance, sharing settings, and reminders. Use the property selector at the top of your dashboard to switch between them — new items are added to the home that's selected.
Pricing for multiple homes
The free Single Home plan covers one home. To add more, upgrade to Multi-Property, which unlocks unlimited homes: $14.99/mo, or $164.89/yr (one month free) when you buy on the web.
On the web, go to Settings → Subscription and select Upgrade. In the Homvio iPhone app, go to Settings → Subscription → Upgrade to Multi-Property. See Upgrading your plan for the details.