I saw this too!
I spent some time on it and created a workflow that automatically creates an excel document for allowing me to book my mileage.
All I have to do his hit a button on my homescreen, enter my mileage from the previous trip, pick between personal or rental and it adds a new line to the excel file. Previously I used to used Siri to make a note, and then I would have to manually type the information into excel. Here is the video I found that was helpful to set this system up.
https://www.youtube.com/watch?v=CWj69U8rVHY
I like the idea of the share availability for showings. However, I recently just started putting a lock on the door and having the prospect send me a picture of their driver's license. After I can verify their identity I give them the code to the unit. This worked out extremely well my first time, I had 5 showings one weekend when I was out of town and one of those showing ended up renting the unit.