How do they ensure the data is updated daily or weekly if they get from county websites and the bulk data they get from these county/notices and court websites is it like a web scraper?

It will not be soon, but the web updates optimized for mobile will be soon.

I run a web development team and still code in web and mobile.

No but navigation of forums in app easier than doing it on mobile web 

Additionally apps are more accessible and faster because some people’s phones take too long to load web pages and they get impatient.

The TLDR version of that web page and other related web pages is that, in Arizona, if you start a foreclosure action against a homeowner who has equity of more than $2,500 in his house using a tax lien certificate, the "defendant" can ask for excess proceeds during the foreclosure action.

Currently work at SpaceX on the Falcon 9 team in Vandenberg SFB in California, Founder of Code Harbor, leading web development for aging industries.

If you have any specific go / no-go criteria, you can evaluate it on the web most likely. 

I have a client that owns a few properties off Web Gin House and they stay rented to long term tenants due to the schools.I'd be very selective and conservative on your numbers going into Decatur / Smyrna / Marietta for a 3/2 LTR - lots of rentals in these areas and can be tough to lease up.

Check them out on the web for reviews.