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Blow Whistle turns your iPhone into a crisp, realistic whistle, with no extra hardware required. Trigger it your way: blow into the microphone, shake your device, tap the screen, or activate it remotely from your Apple Watch. Perfect for getting attention, coaching, pranks, or quick sound effects.

Adjust exactly how you want it to respond with microphone sensitivity controls and full volume adjustment. Choose your preferred whistle sound and, if you wish, display a live microphone level meter for visual feedback.

Features:
- Blow-to-whistle with adjustable microphone sensitivity
- Tap or shake to trigger—no microphone needed
- Apple Watch support: trigger from your wrist
- Select from multiple whistle sounds
- Volume control for any setting
- Optional on-screen microphone level meter
- Works offline, lightweight, and fast

Privacy-Friendly:
- Microphone access is only required for the blow-to-whistle function. You can still tap, shake, or use Apple Watch without microphone permission.

Note:
Blow Whistle is intended for fun and everyday use. It is not a replacement for safety equipment or emergency signalling.

Compatibility:
- iPhone and iPad
- Apple Watch (requires paired iPhone)

Blow Whistle turns your iPhone into a crisp, realistic whistle, with no extra hardware required. Trigger it your way: blow into the microphone, shake your device, tap the screen, or activate it remotely from your Apple Watch. Perfect for getting attention, coaching, pranks, or quick sound effects.

Adjust exactly how you want it to respond with microphone sensitivity controls and full volume adjustment. Choose your preferred whistle sound and, if you wish, display a live microphone level meter for visual feedback.

Features:
- Blow-to-whistle with adjustable microphone sensitivity
- Tap or shake to trigger—no microphone needed
- Apple Watch support: trigger from your wrist
- Select from multiple whistle sounds
- Volume control for any setting
- Optional on-screen microphone level meter
- Works offline, lightweight, and fast

Privacy-Friendly:
- Microphone access is only required for the blow-to-whistle function. You can still tap, shake, or use Apple Watch without microphone permission.

Note:
Blow Whistle is intended for fun and everyday use. It is not a replacement for safety equipment or emergency signalling.

Compatibility:
- iPhone and iPad
- Apple Watch (requires paired iPhone)

Blow Whistle is a beautifully crafted app that lets you blow into your device to create authentic whistle sounds.

Forget carrying a physical whistle, your iPhone or iPad has you covered!

Perfect for pranks or practical uses, the app allows you to adjust sensitivity for various environments. Plus, you can activate the whistle by shaking or tapping your device. Ideal for fun and functionality, Blow Whistle is your portable solution for making some noise.

Blow Whistle is a beautifully designed application which allows you to blow into your device in order to create the sound of a whistle.

No need to carry a real whistle when you have one on your iPhone, iPad or iTouch. You can use it to annoy your friends, parents and co-workers, or just use it as a useful whistle for whatever purpose you have in mind. You can adjust the sensitivity of the whistle for noisy or quiet environments.

You can also activate the whistle by shaking or tapping your device.