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In the pages following are some travel apps that we think are well worth using to let your smartphone add value to your trip.
Some will save you money, some may save your life and some will just make your trip more fun — or simply help you boast about it to your mates.
Please note that some of these apps will be better with, or will require you to have, an internet connection. They were all tested on an iPhone 4, but we have noted when they're available on any other mobile operating systems.
(Credit: Onavo, sigterm)
Onavo is your data-limit hero. In a nutshell, Onavo will compress your data, so that what you use will cost you less. Not every internet service will get the benefits of Onavo compression, but the company is steadily growing its base.
Apps that already have their data compressed include the likes of Facebook, Google Maps, Instagram and YouTube. You even get a breakdown of how much you're saving. It's not only a great way to save data, but also a great way to see which app is using the most.
Whatever your data limits are, you're going to want to keep track of them. Data Usage will give details on every aspect of your data usage, including whether you're likely to exceed your limits. It will even tell you where you last accessed mobile data based on a GPS location, just in case you want to find out where you blew that 50MB.