Whistle - Referee & SOS

Contains adsIn-app purchases
Content rating
Everyone
1+
Downloads
Content rating
Everyone
In-App Purchases
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Need a referee whistle right now? Just take out your phone and hold the button.

Whistle turns your phone into a loud, responsive whistle:
it blows only while you hold, and stops the instant you release -
just like the real thing.

★ FEATURES
• Press-and-hold blowing with instant stop
• 8 whistle sounds: 2 free (Classic Sports, Bright Police) + 6 PRO
(Deep Locomotive, Coach Trill, Samba Party, Bosun Pipe, Rescue Whistle, Air Horn)
• TRIPLE blast and SOS emergency patterns
• Neon sound-wave visualizer reacting to your blow
• Volume control and favorites
• Korean / English

★ PRO SOUNDS
Unlock the deep locomotive horn forever with a one-time purchase,
or open PRO for 24 hours by watching a short ad.

★ GREAT FOR
Referees and coaches, dog training, attention calls,
safety signaling and playing with kids.

★ NOTE
In a real emergency, always use official emergency services first.
Mind your surroundings and hearing at high volume.
Updated on
Jul 12, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location and Device or other IDs
Data is encrypted in transit
Data can’t be deleted
Content rating
Everyone
In-App Purchases
Learn more

App support

About the developer
디케이시퀀스
contact@dksequence.com
대한민국 63546 제주특별자치도 서귀포시 중문상로 34, 1002호(중문동, 중문일성드림타운)
+82 10-9165-6059

More by dkseq5