A friend just told me about this app recently because it reminded her of my writing workshops, and I love it!
How does it work? You select the number of words or phrases you want and the time limit. The app then generates a random set of words for you and starts the timer. Your job is to create a doodle inspired by those words in the time allotted. For example:
Airplane + Laugh
Large + Cabin + Song
Queen + Fire + Glad + Elephant
No planning, no perfectionism. Just play.
You can download the Random Word Doodle app for free from the App Store.