Unfortunately, I have not had much success as I have barely gotten 1 application.

@Demetrius Lindsey yes, this is still applicable today.  

However, there may be alternative tax strategies out there that are more applicable to your current situation or property.

Perform the same task in each app to ensure a fair comparison.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.Run a credit/screening report on yourself.Enter a maintenance request, assign a vendor, and attach a fake invoice.Enter charges to the tenant's ledger.Enter recurring charges and automatic late fees.Sign documents electronically.Run owner reports.After testing a few apps, one should clearly stand out.

I used Zillow to list my rental and accepted someone's application however after my few interactions with them on the phone some major red flags have come up and I wanted to know am I under any legal obligation to rent my property to this person. 

No test, no experience, nothing else needed (beyond an insurance policy number to complete application).  

It is one of the least user friendly application on the market.

It's nice to meet them in person before screening their application.

@David Hernandez do you have legally acceptable rental application and lease?

Seems to me the key variables are: rate, TCV, draw period, origination/application/loan fees.