#1 Free App in the US Apple App Store on March 20?

As of March 19, 2026, the Polymarket odds for #1 Free App in the US Apple App Store on March 20? are: NCAA March Madness Live: 56%, ChatGPT: 18%, CBS Sports App: Scores & News: 8%. These probabilities are derived from real-money trading and update in real time.

#1 Free App in the US Apple App Store on March 20? is currently available on Polymarket. Check PredictMarketCap for cross-platform availability as new markets are added regularly.

Prediction market odds reflect the aggregate opinion of traders who risk real money on outcomes. The price of a share (e.g., 65¢) represents the market's implied probability (65%). Prices move as traders buy and sell based on new information, polls, and analysis.