@Sara131, Welcome to Airbnb. Now you need to invest in some quality time online.....
App is for back-up in my view, and only once you are more experienced and familiar.
If you are a newbie, get online and start getting to know how the whole site works. Start reading through the Help menu and the FAQ's they hold a minefield of information that you need. Doing this will save you a lot of grief and confusion.
You can also do your necessary checks on other members if need be, via the site online, it's going to be a whole lot better.
At the moment you are not doing yourself any favours only relying on the phone app. @Clare0 is correct.
I hope this information is helpful to you.
Have fun learning!!
Regards, Christine.