So like many others here I'm trying to warn you. It might seem lucrative to book a cheap flight via their site but you have no insurance whatsoever. My flight got cancelled and they give you horrible options which make you lose all your money worst-case scenario and you can't go to the airline directly, since they use a different email and credit card to book the flight for you! The airlines can't help you or any law whatsoever so you're better off not booking via their site. No idea of the app.