But after you've set things up, the site will continuously fetch the latest points balances, expiration dates and reward opportunities from all your flight, hotel, car rental and credit-card programs.

BBC: Tracking travel rewards

Punch in your membership information just once for your various loyalty programs (airlines, hotel chains, car rental companies and credit cards), and AwardWallet will continuously fetch your latest points balances and expiration dates.

BBC: Five best air travel apps

In addition, low-fare airlines don't have long histories of customers accumulating billions of miles their programs are younger and often set up relatively quick expiration dates for miles or points.

WSJ: For Frequent Fliers, a Ranking of the Stingiest Airlines