IELTS Collocation is an Android application developed by Study Center. It is a free education and reference app that aims to help English learners improve their vocabulary for the International English Language Testing System (IELTS). The app focuses on teaching collocations, which are essential for expanding one's vocabulary and achieving a smooth natural flow in their writing and speaking.

Collocations are two or three words that commonly go together and sound right to a native speaker. This app provides tips on building one's vocabulary and how to use collocations correctly. It also highlights the importance of collocations in the marking criteria for IELTS, mainly in the writing section, where lexical resource (vocabulary) is a significant factor. The app further explains that collocations are useful in the speaking test as well and can help learners achieve a Band 7 or more.

The app teaches various patterns of collocations, such as verb + noun, verb + adverb, adjective + noun, adverb + adjective, noun + noun, and collocations with 'have' or 'take'. The app is free and supports offline use, making it a perfect tool for English learners who want to improve their vocabulary for IELTS.