Mosquitone Detector 4+

Find the mosquito noise‪!‬


    • $6.99

iPhone Screenshots


"Mosquitone Detector" is a sound measurement app that detects high frequency noises and ultrasonic sounds hard to hear for human ears.

It may have been exposed to artificial high-frequency noise while you do not notice. This app can detect and visualize such high-frequency noises.

In general, the human audible range is said to be 20 Hz to 20 kHz, but very high frequency sounds above 10kHz will gradually become difficult to hear with age.

For example, there are increasing cases where high-frequency noise generators are installed in various places as a purpose of repelling young people and beast pests using very high frequency mosquito noises, which are inaudible to general adults.

Especially for young children, there are cases that they stay in the bad place even though on a very uncomfortable noise environment because adults can not recognize at all. Please use this app to find high frequency noise, so it will help you to quickly get away from the bad spot or remove the noise source.

This app has two operation modes, "Detection" and "Search". Detection mode can check if there are high frequency and ultrasonic sounds that you can not hear. Search mode can find the direction of high-frequency sound source. It can only be used when it has found the peak frequency in Detection mode.

- Detection of high frequency sound and ultrasonic wave, and display the peak frequency of the highest level.
- Search for sound source direction: 360 degrees horizontally
- Detectable frequency range: 8kHz - 16kHz / 16kHz - 23kHz (2 band division)
- Function to switch the gain range: 0dB - 100dB / -10dB - 90dB / -20dB - 80dB (in Detection mode)
- Measurement screen rotation function (Rotate)

Operating procedure:
1) Selection of detectable frequency band
Select the frequency band as more than 16kHz or less than 16kHz.

2) Selection of Operational mode
- Detection mode (Detect)
It finds an inaudible high frequency and ultrasonic sound in the frequency band more than 16 kHz (or less than 16 kHz).
Tap START button and it starts the detection function. If high frequency or ultrasonic sound exist, it will be displayed on the graph as the peak frequency. You can make the graph display easier to see by switching the gain range.

- Search mode (Search)
It finds the direction of occurrence of the high-frequency sound source that detected the peak frequency. Search mode can be used only when high frequency or ultrasonic sound is founded in Detect mode.
Please make sure to hold the bottom built-in microphone of iPhone so that it faces outward. If you measure with the microphone facing inward, microphone sensitivity will deteriorate and accurate measurement will not be possible.
Tap Start button, and firmly hold the iPhone terminal, please turn slowly clockwise. Recommended that the time required for a rotation is about 15 seconds and the rotation speed in the graph is approximately 4 rpm.
The measurement is completed by one revolution, and the signal strength of the peak frequency is displayed on the pie chart. You can find approximate direction of the high-frequency sound source relative to your standing position.

3) Snapshot
Tap SNAP button, you can save the measurement result as “Photos” as an image file. A timestamp is inserted in the image.

If the frequency changes periodically or randomly, it is not possible to determine the direction of occurrence in "Search".
Ultrasonic measurement depends on the sensitivity characteristics of the built-in microphone, so the measurement result may vary.
Peak frequency measurements (dB) conform to general noise levels.

It is still under study about health effects on human body by listening to high-frequencies including ultrasonic sound. If the high frequency noise of high level is detected daily, we recommend that you consult an expert.

Please visit our iOS App Support page for more information on this app.

What’s New

Version 5.0

- Improved internal processing and performance.
- Requires iOS16.6 or later.

Ratings and Reviews

2.2 out of 5
12 Ratings

12 Ratings

DMK to help others ,

No instructions or way to test.

The app does not have clear instructions to interpret any of the numbers. And it isn’t possible to know if it works before you use it. I believe I should have a refund and plan to request one

Developer Response ,

Please refer to our support page for this app. You will find reference information on environmental standards for high-frequency noise.

jamie besh ,

Cyberstalking and torment

Hi I’m James Beshears and I have been tormented and harassed by a few weman for three years with his or hers app or most app with a pitch up that I can hear but most people can’t. The whistle this or these cell phone are sending out causes all five of the human senses to go crazy pain , muscle ,spasms , nervousness , anger and hysteria. It is being used here in this county as a tool to sexually assault me my wife and several other of the county that know what it is. These weman torment me while I work while sleep I can’t eat without choking and there is a constant ringing if y’all can help me get this stopped I’d hug your neck I’m about to stress out from the harassment 24/7 . The weman doing this to use is locked in jail at the mcminn county justice center in Tennessee Michelle and christy richison or Richardson a a couple of the people doing this I tried tell the law and cos at the justice center they act like I’m crazy because that cand hear the pitch up or freqency they are using. Thank you and God Bless

saya70 ,

Excellent App

Very good app does what it promises. One can see khz and decibels and one can do a good search and I love the snap feature

App Privacy

The developer, TOON,LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

Low Frequency Detector
High-Frequency Noise Monitor
Audio Frequency Analyzer
Sound Level Analyzer

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