Other apps claim to emit ultrasonic waves (frequencies above 20,000 Hz) that are inaudible to humans but supposedly create a "stress response" in the mosquito's nervous system, forcing them to leave the area. The Scientific Reality: Why They Often Fail

The search for a "sonic mosquito repeller APK download" often leads to various mobile apps that claim to drive away mosquitoes using high-frequency sounds. However, while the idea of a chemical-free "silent" repeller is appealing, scientific evidence overwhelmingly shows that these digital tools are ineffective at preventing bites.

Some apps aim to replicate the sound of a dragonfly's wings (a natural mosquito predator) or the high-pitched buzzing of male mosquitoes. The idea is that biting female mosquitoes, who have already mated, will avoid males or predators.

Major health organizations and entomologists have repeatedly debunked these claims. Ultrasound mosquito repellents: Zapping the myth - BBC News

The theory behind these applications generally relies on two main concepts: