Dreamily has to be the best AI Story generator app I've used.

Ups:
• It can write literally ANYTHING. Want to write a Fanfiction but can't come up with anything? BAM. Want some ideas on an original story you're writing! Dreamily's got you covered.
• You can edit your world so that even IF it doesn't understand, it will. Decked out with character adding and gender settings, world descriptions, etc. It can do pretty much anything you want.

Downs:
• Sometimes it will add new characters completely unrelated to the world (e.g. writing a bfdi story, it will add a new character named something like kal or lucy)
• Sometimes it's stories will be unrealistic to the world. Random explosions, powers, you name it.

Overall, I would recommend this. Great job, Dreamily team!