I just return from Thailand and I can honestly say, there are so many beautiful girls out there, that are not sex workers,
but also there are a large amount of beautiful freelancers especially on walking street in Pattaya after 10pm, and around Koh San Road,Nana Plaza and Soi Cowboy in Bangkok
If you are going to use an app just make shore you set your location to the city you are in, buy some credit so you can reply, and make your profile short and sweat, like looking for fun and a good time,
A lot of the freelancers will do the same, have a short profile stating the same, than just ask them do you want to meet up,