Whistle
Anywhere, Anytime
Six synthesized whistles in your pocket. Loud, real, and always ready — whether you need a signal, a blast, or a backup when there's no whistle in reach.
Six synthesized whistles in your pocket. Loud, real, and always ready — whether you need a signal, a blast, or a backup when there's no whistle in reach.
All sounds are synthesized in real time — not recordings, not samples. Authentic trill, breath noise, and harmonics that actually sound like the real thing.
A piercing, high-frequency blast. Cover your ears.
Sharp lifeguard authority. Built for immediate attention.
Classic metal pea whistle with commanding presence.
Warm, vintage tone with rich harmonic depth.
Deep, resonant bellow. Passing ships take note.
Ultrasonic novelty. Your dog may or may not care.
Not just a sound button. Whistle gives you pattern, timing, and volume control — all adjustable live while the app is playing.
Single, double, triple, or rapid-fire. Set the gap between blasts to the millisecond.
Enable auto-repeat and Whistle loops your pattern continuously until you tap stop.
Dial in blast length from 0.1s to 2.0s. Adjust volume independently from device level.
Plays even when your iPhone is on silent. Because a whistle that doesn't blow isn't a whistle.
No internet required. All sounds are generated on your device. No accounts, no ads.
Switch apps and Whistle keeps playing. Works with repeat cycles for continuous signaling.
Whistle lives on your phone for the moments when you don't have one handy — and for all the moments you do.
Free to download. No account. No ads. No internet required.