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Many Worlds for iOS

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For bug reports, feature requests, or questions, please open an issue on GitHub Issues.

Frequently Asked Questions

Why does the app need camera access?

Many Worlds uses your camera sensor's photon shot noise as a source of genuine quantum randomness. It captures a single dark frame at minimum exposure, extracts the quantum noise from pixel values, and converts that noise into random numbers. No photos are taken or stored.

Does the app take or store photos?

No. The camera captures a single nearly-black frame, processes it in memory to extract random bits, and immediately discards it. Nothing is saved to your photo library or transmitted anywhere.

Does the app work offline?

Yes. Many Worlds has no internet dependency. All randomness is generated locally on your device using the camera sensor. The app makes zero network requests.

How is this different from a regular random number generator?

Most random number generators use deterministic algorithms (pseudo-random). Given the same starting state, they produce the same sequence every time. Many Worlds uses quantum noise from your camera sensor, which is fundamentally unpredictable. The randomness comes from quantum physics, not math.

What is the Many Worlds interpretation?

In the Many Worlds interpretation of quantum mechanics, every quantum event causes the universe to branch. All outcomes happen, each in its own branch. When you flip a quantum coin in this app, both Heads and Tails occur in different branches. You are discovering which branch you are in.

What devices are supported?

Many Worlds requires an iPhone running iOS 17 or later.