There are tons of currency converters out there and you'll have to decide which one is best for you. My requirements are as follows: Ability to show somewhat obscure currency. I travel to weird places, I need to know what the exchange rate is for slightly off the beaten path locations. Ability to log the last rate and tell me how old it is. How many travelers only want to convert currency when connected to wireless or data? Yeah, again, if you're ever travelling to an out of the way place you may not have data (expensive if available) and likely don't have wifi (money changers are usually not hotspots) so having the last known price is absolutely imperative. Needs to be obvious to use. If I have to poke around to figure out how to use the app I'm annoyed. It's not a particularly difficult subject to make easy to use. This app mostly wins on all fronts though changing the amount you want to convert wasn't obvious to me at first. That said, it's a clean and easy to read layout which is helpful for tired eyes trying to do math and speak a foreign language so that's also a win. This is definitely one of my top two converter apps.