Appfolio and QBO actually doesn't have a native integration with one another via the App portal.

Usually due to the integrity of the property, the first thing you want to do is have an engineer to inspect the property and determine what would need to happen to cure the structural integrity issues of a burnt building and draft new plans in order to get it to a habitable condition

They figured out a PMS integrates better if it's only one software instead of many, so after much research they choose the best to ingrate with.

It also integrates with maintenance and lease signing.3.

The native integration between tools is nice—for example, you can create an estimate in CRM, auto-fill a quote template through Sign, and send it for signature with just a few clicks. 

Set up the essentials First, log in and make sure your profile, email integration, and phone settings are configured properly.

What other software do they integrate with?

@Edwin Valerio better integration with quickboiks or the ability to replace it.

Full transparency...for the last week and a half I've been wrestling tech issues...website, third party integrations, incompetent tech vendors, 10DLC compliance nonsense and the line of third party vendors lined up to exploit the requirement, bloated non intuitive software with even more incompetent 'know nothing' so called tech support. 

Always lead with integrity, even when it means walking away from a deal.2.