Cash App/Zelle 

Great for automating the communication between apps.

If someone is really interested have them fill-out the app there if they can, and give you the Security deposit now (refundable if they don't pass the Mustard test).

My hunting app constantly shows properties I'm interested in to be well below the listed acreage.

Now you can find houses through agents, websites, apps, and get instant notifications when the right house hits the market.

Does anyone know of any software/app that allows you to use a photograph of a property and show what it would look like after renovation?

I am actually a real estate agent for a new home builder as my day job too. hahaBut there are few meet ups around the central valley, I have never been personally but if you download the meetup app you can find some local REI events.

I used the numbers I was given and plug them into an app I downloaded.

If you don't have a lot of money to invest every month and don't want the little money you are trying to invest get eaten by trading fees(even though they are usually less than $10/trade), I recommend using the Robinhood app. 

I am a property manager app folio has some great stuff.