I like it because it has a cool interface and it is free.

In regards to finding cash flowing properties and improving your cash on cash return there are numerous posts and articles posted here on BiggerPockets about markets in the Mid-West that will provide these returns.Take some time and browse the articles and posts and you'll find what markets interest you and then you can start digging and doing your due diligence.

@Craig Cude you are correct that zillow took away the ability for most of these software to interface.

But also the most complete (and expensive).Expensify I would say is the easiest to use and has the best interface, but it only does expenses (not income).If you're in it for the long haul it's worth considering Quickbooks as you'll eventually get used to the (awful) interface and malfunctioning rulesets, and as you grow and need more complicated things it will have them. 

It has a very clunky interface to communicate with prospective tenants.

I moved from TenantCloud to Cozy because I fell in love with Cozy's interface.

We make keeping the books easier and faster with a unique, property-centric interface, industry specific transaction templates and reports, and personal customer service. 

Tax sale resources has a fairly decent database (it is comprehensive, but the user interface is a little off) of real estate tax delinquencies. 

While browsing Roofstack, https://www.roofstock.com/investment-property-marketplace I got my hopes up for a multi family (2-4 unit).

If a company can provide just the infrastructure of how transactions are routed and allow the bank to integrate that with their existing UI (user interface) then you really wouldn't even need an app like Venmo and Zelle to conduct your business.