You say you're a frequent traveler, but if you're not hopping from city to city with one of these sherpa-like applications on your iPhone device, you don't travel frequently enough. Yelp's mobile software provides indispensable knowledge on countless local businesses, all crowd-sourced from the folks that use them most. If you subscribe to the Up In The Air lphilosophy of living terminal to terminal, the Flight Updates and Airport Maps apps we'll keep you informed and on-time for all your departures, arrivals, and layovers. And for those seeking R&R at a sunny locale far from home, use our favorite weather apps to avoid approaching storms as well as catch early wind of nasty allergen alerts.

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