Once you pay for the annual subscription fee to get rid of the ads, this app is excellent. Miss an offline mode though, like in Google Translate.
Just a awesome help by reading books
The Chinese dictionary is not as comprehensive, still my first app to start when looking up a word.
I have subscribed to the ad-free version to support the LEO Team and maybe get an optimised interface, but it means also, that I expect absolutely NO ADS on my smartphone in the leo app. Because the ads are still coming, wasting my bandwidth, wasting screen space and blinking, the subscription has been cancelled and the app removed from my phone. The web browser with ad-free website is still a viable option.
The dictionary itself is quite good, the app with it's outdated UI and its "unique" color scheme not so much. The UX isn't great either, tapping on a forum discussion, for example, usually just leads the user to some sort of mobile homepage, not the discussion itself; retrying a couple times usually (but not always) works. The forums are an important part of what the app has to offer, though, as the dictionary entries are sometimes incomplete or missing.
The dictionary is one of the best. Few of the others show you the definite article with nouns - an absolute "must" for European languages. However the App isn't as good as the Web version. Less than half the words I looked up had an associated Speaker symbol allowing me to listen to the pronunciation. Maybe I'm a bit stupid, but I also can't get the Trainer to work - unable to save anything and can't find Help anywhere, not even via a Google search. And I do have an account.
New language courses for English and German
The only online and offline Dictionary and Thesaurus with every word you look up