MOSQUITO PATROL: Sound Timer

Choose a tone from 9–22 kHz MOSQUITO PATROL lets you select and play a tone in the 9–22 kHz range. Instead of playing a recording, the app generates a pure tone at your selected frequency and loops it. Adjust the frequency with the slider in Automatic mode, or browse the 17–22 kHz preset cards in Manual Selection. The cards include contextual labels for settings such as camping, wooded trails, and indoors. Set a schedule that fits Choose a start and end time, use a 1-, 3-, or 5-hour quick option, or select Unlimited for continuous playback. Your schedule appears on the home screen in 24-hour format. Simple playback Tap Start to play your selected tone. Playback continues in the background while you use other apps or the screen is off. Return to the app whenever you want to stop it. Please note This app generates and plays a pure tone at the selected frequency. Mosquito-repelling results are not guaranteed and may vary by device and environment.