In the web app, reservation check in/out times is in your device's time zone.

In the mobile app, we decided to go smarter, and show all times in the listing's timezone, because regardless of where you are in the world, a 1pm check-in should be a 1pm check in.
For most users, this should not cause any issues, but if you're operating in a different time zone than your listings, you might see a discrepancy between the web and mobile versions. We're planning an overhaul of the web reservation page in the coming months.