Do not use the app. The predictor is totally wrong. I decided to wait and book a flight at the suggestion of this app. The price predictor changed several times. Each time, I was instructed to wait, but the predictable "lowest price" continued to rise. After the price rose by $100, it decided to suggest that I buy, using their app of course. I ended up paying $110 more for my ticket, than the price on the original ticket. Deleting this piece of trash immediately.