The Eastern Conference semifinals are heating up, and there's nothing quite like a Game 7 showdown between the Philadelphia 76ers and the Boston Celtics at TD Garden. As these two historic rivals prepare to settle the score, fans are looking for every edge—both on the court and in the prediction markets. If you want to add some extra excitement to Saturday's must-watch matchup, here's everything you need to know about the best NBA prediction market apps and their top offers.

For those new to the game, prediction market apps let you trade on outcomes like who will win the game or which player will lead in scoring. It's a fresh, interactive way to engage with the playoffs, and right now, there are some solid sign-up bonuses to help you get started. Polymarket is a leading platform, and new customers can use promo code TSNEWS to unlock a $20 bonus after making an initial deposit of at least $20. The process is simple: register an account, deposit the minimum amount, and the bonus is automatically applied. Just remember, you need to be 18 or older and physically located in an eligible state to participate in this NBC/Peacock broadcasted game.

But savvy sports fans know that shopping around is key to maximizing value. While Polymarket offers a great entry point, other NBA prediction market apps are also rolling out bonuses for the May 2 games. For example, Kalshi is another popular option that's quickly gaining traction nationwide. Make just $10 in trades on Kalshi, and you'll lock in a $10 bonus—and it's available in all 50 states. Diversifying your platforms not only gives you access to multiple sign-up offers, but it also lets you compare probabilities and find the most favorable odds for whichever side you're backing in this high-stakes Game 7.

Whether you're riding with Joel Embiid and the 76ers or trusting Jayson Tatum and the Celtics at home, using these prediction market apps adds a new layer of strategy to playoff basketball. Check out the offers, pick your platform, and get ready for what promises to be an unforgettable night in Boston.