Dont use this app or expedia in general
For hotels use something like trivago or booking.com, you wont have such a frustrating experience with hidden charges, cancellation fees that arent disclosed up front, complete inflexibility, and telephone help staff that are intellectually and linguistically challenged. For flights, book direct with the airline, many offer lowest price guarantee, and if you need to change, the process is much simpler - and you wont have to deal with above mentioned telephone staff
I H Newton about
Expedia: Hotels, Flights & Car, v6.12