This web-based service, which is optimized for mobile phones, is by far the easiest and most comprehensive way to keep track of all your frequent-flier programs (including elite ones) and make sure you use your miles before they expire. For a one-time app fee of $5.99, you also get up-to-date listings, by program, of current bonus offers, plus a trip calculator, so you can see exactly how many miles you’ll earn. Visit MileBlaster