Bettorly: Smart Parlay Builder

For a free application provides a great amount of historical data. Very good if you know what data you like to track already

Love the instant feedback when you click Analyze — it actually tells you if your parlay has good correlation or if you're making a mistake. The interface is clean and quick, no lag or clutter. Makes putting together parlays way easier than any other app I've tried

Great experience using this app. There are tons of great features, my favorite is the “bet synergy” strength, that tells you the likelihood that your parlay legs happen in the same game