Full disclosure: the founder bowls, throws darts, and takes cornhole way too seriously, and could never find trackers that didn't stink. So these keep score for real and settle who actually won, free, with no ads.
Part of Play. See the party games

Strikes, spares, and tenth-frame fill balls handled for you, with the total updating as you go. Tap the pins you actually left and it works out opens, spares, and splits by the real USBC definition.

Score a match to 21 with bust and win-by-two handled, and cancellation scoring worked out for you each round. Singles or doubles, with a board that shows who is up.

X01, Cricket, Around the World, Count Up, Bob's 27, Shanghai, and Killer. Doubles or master out, suggested checkouts, busts and Shanghais called, and a fast keypad with a multiplier lock for drills. Keep the darts you throw on hand, colour and all.

Keep score for any game you play. Name it, add players from your Orbit or as guests, then tap to keep the tally. Pick high score or low, set a target or just play until you call it, and it crowns the winner. No rules to learn, it counts.
Spin up a bracket for any tracker here, or anything you play offline. The host records each result from any phone, and the bracket updates live as the rounds play out.

This is the part that got out of hand. Darts gives you three-dart averages, 180s, and checkout percentage; bowling shows spare conversion on every leave and your most-missed pins; cornhole keeps your four-baggers, win rate, and current streak. They quietly tell you what to practice, and any game resumes on any device.

Most score apps give you a number and a charge. These give you a coaching report and a bill of zero.
Bring it to the lanes, the pub, or the garage. Your average will thank you.