I've been a fan of GateGuru since I first tried it in 2010. It's a travel app for the iPhone that provides a plethora of information of flights, airlines and airports. It's great having all of that in your pocket. The version 4.0 fixes some problems and makes GateGuru even better.
Version 3 was nice but had nagging problems. For example, it required me to enter flight details, even when that's not the information I'm after. For example, sometimes I simply want to review the amenities that are available at a certain airport. GateGuru 3 needed flight info before sharing that data.
With version 4, released today, all is forgiven. The free app now allows you to browse airport information with no restrictions. The entire app has been redesigned and it looks very modern. Plus, the amount of tapping has been reduced when you navigate, and all your travel information is on one screen.
GateGuru excels at travel info, including airport weather, terminal and gate arrival and departure info, and real-time flight information with optional push alerts for flight status. The app also provides estimated TSA waiting times, and reviews of airport food, location of ATMs, and rental car information with some discounted rates for GateGuru users.
I have one mild complaint. GateGuru caters to the traveler, and not the person who's simply doing the pickup. Yes, you can get the information on arrival times, but it's not really the purpose of the app. I prefer Flight+ which is a bit more agnostic on whether you are the traveler or the transportation. I'd like to see GateGuru add travel times to the airport based on local real-time traffic info, and travel/traffic time to a particular address like a hotel or convention center.
Still, GateGuru is an absolutely indispensable app for those traveling by air, especially since so much of air travel involves sitting at airports. This new version is one of the most improved apps I've seen this year. If you travel, I heartily recommend adding it to your iPhone's travel folder.