Absolutely! You can log into your Roadtrippers account on multiple devices to access your trips.
Trips created and changes made to trips in the web app on our desktop site will automatically sync to your account in the mobile app or on any other devices you're logged into - and vice versa! Just make sure that you're logged into the same account in both places.
If you are not automatically seeing trips synced when looking at your trips in the Profile section of the mobile app, try pulling down on the list to refresh it. If refreshing the list doesn't help, please log out and back in and check again.