Manifold Markets is an iPhone app developed by Manifold Markets Inc. that allows users to create and participate in play-money prediction markets. This unique app provides a platform for users to test their predictions and bet on the likelihood of various events happening.

With Manifold Markets, users can challenge the odds and make play-money if their predictions turn out to be correct. The app allows you to create prediction markets on any topic you're curious about, giving you the opportunity to trade with your friends and forecast the future.

The app's user-friendly interface makes it easy to navigate and participate in prediction markets. It provides a fun and engaging way to test your predictions and see how they stack up against others.

Manifold Markets is a free app available in the Education & Reference category under the Books subcategory. It offers a unique and entertaining experience for users who enjoy testing their predictions and engaging in friendly competition.