Airfare ain’t getting any cheaper, and it’s getting so that it’s sometimes cost-prohibitive to go where you want to go when you want to go.

That’s why I recommend Hopper’s mobile app. With it, you can enter where you want to go and either specific dates or approximate dates, and then you can set up a watch so that you know when the flight is cheapest.

The cool thing is that Hopper will predict whether your flight will go up or down in price, and will tell you if you should book the ticket now or wait. I managed to snag roundtrip tickets from San Diego to Venice in September, normally $1500, for just $750, thanks to Hopper.

The best part? It’s totally free.

Download Hopper’s app today.