I really loved Yapta.They would track flights for you and let you know when the price went down (whether you'd purchased the flight or not). However, the last 6 mos. or so, I have not been happy with them. They missed price drops (when I've checked, the price was lower than when they checked) AND they have notified me of price drops and when I immediately check with the airlines, the price has NOT gone down. And then on their site, for a ticket I've purchased, I cannot get it to recheck the price (edit does not work to do so), so it continually shows the price has gone down (and thus I am eligible for a travel voucher), when this is not the case. Also, they are not keeping up with changes in the airlines' policies (e.g., Alaska airlines, on Sept 1, 2018, changed their policy so that they no longer issue travel vouchers for nonrefundable fares. However, Yapta still says I am eligible for one). I've attached a photo from today that indicates a price drop of $170 and thus eligibility for a travel voucher, but it isn't available (and no way to change it on the site). I've tried contacting them via their web site several times, and have heard no word back.