Infinite Worlds AI Game Master

An AI Dungeon Master that runs on the phone itself or with Claude and your own key. Dice, a character sheet and a world that remembers. Ten models, no account.

Infinite Worlds is a solo tabletop adventure with an AI Game Master. Describe what your character does; the narrator writes what happens next, remembers it, and keeps your character sheet, the people you meet and the threads of the story straight from the first chapter to the last.

CHOOSE WHO NARRATES • On this iPhone: download a model once and play offline. Ten to choose from, in three sizes for 6, 8 and 12 GB iPhones, from Google, Mistral, Alibaba, Nous and the roleplay community. Nothing you write leaves the phone. • Claude, with your own API key from Anthropic: the strongest prose, billed to your account, and the app asks once before any text leaves the phone.

THREE WAYS TO PLAY • Dungeons & Dragons: a classic campaign with dice, hit points, gold, experience and levels. Fate is a d20, and the narrator reads the roll. • Custom World: any genre and any premise. Set the stage in a sentence and step in. • Worlds from the PC game or the web edition: bring a world seed or a whole story file and carry on where you left off.

A STORY THAT REMEMBERS The game keeps your sheet, inventory, allies, places and open threads outside the model's head, and writes a running summary as the chapters pile up, so the twentieth scene still honours the first.

MADE FOR THE PHONE • The narrator's options become tappable chips; type anything else. • Five difficulty levels, from Story to Brutal. • Passages read aloud if you like. • Export a transcript or share a world.

FREE TO START The download is free: the Sample storyteller and your first 20 turns with an AI narrator cost nothing. One purchase, Infinite Worlds Full, then unlocks unlimited turns for good. No subscription, no account.

PRIVACY There is no account and no server of ours. With a model on the phone, nothing leaves the device. With Claude, your text goes to Anthropic under your own key and their terms.

Infinite Worlds is written for teens and adults: the stories can be dark, violent and intense, and an AI narrator is unpredictable. Requires an iPhone with at least 6 GB of memory for the on-device models (iPhone 14 or later); Claude works on any iPhone running iOS 27.