I also run online businesses. 1) You will want a website that has a form submit so you can capture email, phone number, etc. of people who are interested that visit your site.

Get outside and look at property, if you see for rent signs call the number, get used to talking to people on the phone and face to face...there is so much more i can write but it will take a book. 

That would be difficult to manage fir me I purchased bandits that I'm planning to put out tonight hopefully I can get a response from that, but my question is how can I actually get their phone number to cold call the owner about the property?

Octavian, at one point I'd installed a bunch of real estate apps, but like most of my apps, I found that I rarely used them and eventually forgot about them.About 6 months ago I upgraded my phone and don't think I remembered to install any of them on the new phone, and completely forgot about them until you mentioned them.For agents, the RI statewide MLS recently switched from Fusion to Matrix, and I think part of the reason for switching was a better app/mobile experience, so that's probably one of the few apps I could recommend.Other than that, maybe Google Sheets or Numbers for iOS - spreadsheet apps - would be useful.One other app I could maybe recommend would be Venmo for payments, as some tenants and contractors have asked about using that.

I'll also jump on the State of Texas Savings and Mortgage Lending website and download a list of licensees doing business in Texas which results in an additional 2700 companies (names, phones, addresses and emails) that are either licensed mortgage bankers, servicing companies or mortgage companies.  

Sorry my phone kept crashing when I posted and it became a third same message

Where do you get phone numbers for free??

You need to know how to deal with them on the phone.

I have bundled service for TV/Interne/Phone.

I tried to handle this over the phone, and the tenant stated he was "doing his best" and that my expectations were unreasonable.