We Write

Create stories that can be contributed to by anyone with the We Write app. Contribute to other's stories. Edit your collaborative stories to correct and polish them. Using collaborative stories, you can explore your wildest fantasies and see how other writers react with their own ideas. Or you can focus the imagination of collaborators to delve into a particular kind of story.
All stories are stored in the cloud. Stories and accounts are shared across devices and platforms.
Note that usage of the app is limited and you can only create 3 stories unless you purchase a subscription. With a subscription you can create up to 99 stories and have access to all features. Subscription is annual - for local cost please see the Purchase page in the app.