Unusual Whales is a free Android application in the Business & Productivity category, specifically designed for finance professionals and enthusiasts. It offers a variety of features that help users monitor and analyze options activity, including custom alerting, filtering tools, dark pools, full options flow, options profit calculator, hot chains, and sector rotation.

The app's interface is intuitive and user-friendly, providing users with a comprehensive overview of the market movements and the necessary tools to make informed decisions. With Unusual Whales, users can get alerted on market movements, track unusual options activity, and access a range of financial tools to optimize their investments. Overall, Unusual Whales is a great addition to any finance professional's toolkit and an essential app for all options traders.

Note that Unusual Whales is only available for Android users with +12 versions.