eCurrency is indispensable when you need to convert currencies quickly. Rather conveniently, it also can be used offline when there’s no data connection, synchronising the latest exchange rates when each time it starts. 190 world currencies are supported — from the Andorran Peseta to the Third Zimbabwean Dollar — so unless you’re planning to visit North Korea, you’re covered. Extra features such as favourites and “shake for inverse conversion” make eCurrency an essential little travel companion.