As one of its daily deals, the Amazon Appstore for Android offers downloads of FlightBoard for Android for free. That’s the lowest price we I find for this live flight tracker by $4. This App allows you to track flights on your phone, covers over 16,000 airports and 1,400 airlines worldwide, is updated every 5 minutes, and is optimized for tablet screens. Sounds good to me especially if you are a frequent traveler! Deal ends today.