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Pros
Pro Free
You can download and use this app for free.
Pro Can be used offline
12 languages are supported for offline use. You have to download them first over a connection, and can access them any time.
Pro Practical, clean user interface
The app design makes it very fast to use, with 3 options given when you open the app that will immediately let you start translating.
Pro Supports Android Wear
Cons
Con Single direction translations only
The app doesn't support translating a conversation in two languages. Currently, the translations are unidirectional only.