If you are looking for a Chinese Dictionary App on your mobile phone, do check out Pleco! It is a very good Chinese Dictionary, and best of all it is free!
iOS Pleco (For iPhone, iPad): https://itunes.apple.com/en/app/pleco-chinese-dictionary/id341922306?mt=8
An immensely powerful dictionary now fits in your pocket phone! It is unbelievably good for a free app, and very highly rated on the App Store.
Do use it regularly, and your Chinese standard is bound to improve.