Kayak is free, but ad-supported in Google Play. It is normally priced at $1.00 in the Amazon Appstore. As we've noted before, there are sometimes differences in pricing and availability between the two marketplaces.
Kayak Pro is described as follows:
Find the best flight or hotel in no time!Kayak Pro (in ad-supported form) is rated at 4.5 stars in Google Play, and has 2.9 stars in the Amazon Appstore. This game is a "buy" while it is free.
Traveling and in need of a hotel room at the last minute? Ready to take off for your long-anticipated tropical vacation and want to monitor your flight times? Worried about delays, gate changes, and cancellations due to severe storms? Sounds like you could use a little help.
Travel with Ease
Kayak Mobile connects you to Kayak's travel website. Never again be at a loss for all things travel-related. Find the right flight. Get the perfect hotel. If your flight is canceled, be the first to know, and find a new one with the tap of the finger. Compare travel sites in one search when booking your flight, hotel, or car rental. Keep track of your flight, hotel, and car reservations when you are on the move. Be notified of flight delays or gate changes. At airports, access maps of restaurants and ATMs in the area.
You never need to be worried or frustrated--or lost--again. Everything you need is in a single app. From helping you plan your trip and purchase tickets to ensuring that you are safe, relaxed, and happy during your trip. And if you hit a snag, it can help you adjust on the fly. Traveling doesn't need to be a chore.
Kayak Mobile is here to make travel planning and management easy, so you can focus on enjoying the trip.
This PRO app is the same as the free app; the only difference is that there are is no text banner ads on result pages.
iOS App Store. It is priced at $0.99 and has a 4.5-star rating overall, and for the current version.
We continue to be disappointed with the FAOTD program. It began promisingly enough, with Angry Birds Rio, but we've gotten tired of the endless games or niche apps, and especially apps which have no uptake in Google Play, and seem to be FAOTD as a desperation move by the developer.
We'd like to see free versions of say, Office-compatible software or useful utilities such as CalenGoo instead of niche apps or endless games (we just assume every day that it's going to be a game; it's gotten that bad).
Amazon.com opened up the Appstore despite a lawsuit by Apple, which has previously trademarked the term "App Store." Microsoft has filed an appeal against that trademark, saying the term is too generic. Amazon.com has responded to the lawsuit in the same manner.