A Dozen Words Daily is a free Android app that aims to help intermediate to advanced English learners to build their vocabulary efficiently and conveniently. It is based on the "a word a day" concept and allows users to learn up to 12 English words a day. The app provides free access to more than 7,000 words handpicked from the GRE, SAT, TOEFL, and IELTS official vocabulary word lists.

The app features an inbuilt algorithm engine that uses the proven SRS system to test the user on the words they have learned. The algorithm tests the user on a basis of decreasing regularity if they answer correctly, and if the definition of a word is incorrectly answered, the app adjusts to test the user more on that word or "deactivate" it while they learn other words. This feature ensures that users learn the words effectively and retain them in their memory.

A Dozen Words Daily is an easy-to-use app that is perfect for anyone who wants to steadily increase and grow their English vocabulary daily at their own pace and convenience. It is a reliable and efficient resource that can help users achieve their language goals.