Whistle - Loud Whistle Sound

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 included (Whistle, Ambulance) + 6 PRO (Train Horn, Air-raid Siren, Emergency Bell, Vuvuzela, Rescue Whistle, Air Horn) • TRIPLE blast and SOS emergency patterns • Neon sound-wave visualizer that moves while the sound plays • Volume control and favorites • Korean / English ★ PRO SOUNDS Unlock all 6 PRO sounds 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.

· Stability and screen transition improvements