Whistle – Anytime, Anywhere

Whistle is a free whistle sound app that puts six distinct synthesized whistles in your pocket—no recordings, no samples, just real-time generated audio that sounds like the real thing.

Whether you need a referee whistle for sports practice, a coach whistle for training, a lifeguard signal for the pool, or just a loud sound effect to get someone's attention, Whistle has the right sound for the moment.

SIX WHISTLE SOUNDS • The Screamer—a piercing referee-style whistle blast • The Guard—sharp lifeguard whistle with commanding authority • The Coach—classic pea whistle tone built for sports coaching • Old Timer—warm, vintage police whistle with rich harmonics • Foghorn—deep, resonant foghorn blast • Dog Whistle—ultrasonic tone (novelty/humor—device speakers can't reproduce it, but it's in there).

PATTERN & TIMING CONTROL Choose single, double, triple, or rapid-fire blast patterns. Control the duration of each blast (0.1s to 2.0s), the gap between blasts, and the pause between repeat cycles. Enable auto-repeat to loop your pattern until you stop it.

SIMPLE. OFFLINE. FREE. No ads. No account required. No internet connection needed. Whistle works entirely offline—all sounds are generated on your device. Works even when your phone is on silent.

Perfect for sports coaches, referees, lifeguards, camp counselors, dog training, games, pranks, or anytime you need a loud, clear signal.