Diki is a free multimedia English-Polish dictionary developed by eTutor. It offers a wide range of specialist dictionaries, including medical, law, marketing, IT, and business dictionaries, in addition to a general dictionary of English.

The app has over 430,000 entries of general and specialized English vocabulary, words and phrases recorded by native speakers, and over 2,900,000 example sentences. Diki also supports autocomplete for entering words quickly on your mobile device, phrasal verbs, idioms, and popular expressions.

It is important to note that Diki requires an active internet connection to function properly. Overall, Diki is a useful tool for anyone looking to improve their English language skills and expand their vocabulary in specific fields.