Fitness Challenge Club makes it effortless to organize fitness competitions with friends, family, or coworkers. • No account needed, jump in instantly. • Built-in group chat right next to the leaderboard. • AI walking opponents, start competing immediately, even solo • Compete on steps, calories, distance, flights climbed, or Apple Health Rings. • Completely free, no fees, no subscriptions, no ads. iOS only. Privacy-first, Apple Sign-In keeps your email private. Use it fully anonymously.