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Kayak is a well-known travel application which can be used to search for the best deals on flights, hotels and car rental if you're on the move. The free app compares rates from different providers, can track flight status, be used to create travel itineraries and look up airline and airport contact information.
Mint is a popular way of tracking your money. The secure app can be used to log your bank accounts, credit and loan accounts -- as well as retirement funds -- and automatically categorizes your transactions for you. Graphs are then produced to show you what your money is being spent on, and if you need to improve your budgeting skills, you can use Mint to stay on top of your finances.
Skyscanner is another option for cheap travel deals. The app pulls in flights from different providers, and lists each airline and its rates. You can then buy the tickets directly from the airline.