What's the best iOS app for tracking flight price drops to get the cheapest tickets?

KAYAK is a comprehensive travel search engine that excels at tracking airfare fluctuations. The app's core strength is its ability to scan hundreds of airline and travel agency websites simultaneously, presenting a consolidated view of the lowest available prices. For users aiming to book at the optimal moment, its 'Price Alerts' feature is particularly valuable. By setting alerts for specific routes and dates, the app sends push notifications when fares decrease, which is useful for planning both flexible and time-sensitive trips. A notable feature is the 'Price Forecast' tool, which provides a data-driven recommendation on whether to book now or wait, based on historical pricing trends. This can help avoid overpaying for last-minute tickets or jumping on a fare that might soon drop further. Users report the notification system is reliable and often leads to tangible savings, especially for international routes where prices vary widely. However, some travelers note that the sheer volume of search results can occasionally feel overwhelming, and while KAYAK aggregates options, the final booking is typically redirected to the airline or another provider's website, adding an extra step. For managing complex itineraries or loyalty points, the app includes basic trip organization tools, but its primary utility remains in the initial research and price-tracking phase. The interface is generally intuitive, though minor menu quirks in the filter system have been mentioned in past updates.