A free app for Android, by Absolutist Ltd.

Words and Riddles: Crosswords is a free word game offline and in your spare time. It’s a fast, simple, and effective way to improve your vocabulary. If you enjoy solving crosswords and other word puzzles, this brain teaser is made for you. 

How to play:

You can use the touchscreen to control the game. The aim is to choose letters that make a word. You will not be limited in time, but you will get a bonus score for completing a puzzle faster than your opponent.

You will be given clues to help you guess the word. There are multiple levels of difficulty and you will need to use your vocabulary to solve the riddles.

If you enjoy this brain teaser, make sure to check out other puzzles from the developer.