Knowster - Real-time quiz duels vs. the world, now with Google Sign-In

Hi Product Hunt, back with an update! Since our first launch here in July, we shipped a lot based on what people told us: Google Sign-In (alongside Apple/email), an in-app way to rate the game, and a fix for a matchmaking bug where a search could occasionally hang with no opponent found. We also did a full technical rebuild for stability and performance, and iOS and Android are now at full feature parity for the first time. For anyone new: Knowster matches you live against someone from another country — same question, same second, each in your own language. Faster correct answer wins, and every win counts for your nation in a seasonal leaderboard. Would love more honest feedback, especially on the matchmaking experience now. Happy to answer anything!