With Writing Challenge you will enjoy a game with creative prompts to spark your inspiration and master free writing. It's easy. You just have to press "start" and the app gives you the first prompt to start writing your story.
Choose the one that you most like and fire up your writing. Then, every minute (or the time you choose in the app settings) the app will give you a new prompt for you to add new ideas, words, characters, sentences, places or actions to the plot. Quite a challenge to turn your writing into a game!