Infrasound Recorder

In-app purchases
146 reviews
Content rating
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About this app

The RedVox Infrasound Recorder captures sub-aural low frequency sound from volcanic eruptions, sonic booms, meteors, earthquakes, tsunamis, surf, and anything big that blows up.

Be part of the world-wide infrasound exploration!

Recording and streaming over wifi or cell starts as soon as you hit play.

The main display shows the infrasonic pressure recorded with the internal microphone and (if available) barometer. Microphones plugged in through the data port or audio jack will override the internal microphone.

Sound files are sent anonymously to the RedVox cloud server at

Your app version and RedVox device ID is shown in the lower center of the front page, and can be changed in Settings.

RedVox Recorder can record in the background to continuously monitor infrasound events and ambient noise. Although continued recording will consume more power, with the screen off it can run off the internal battery for many hours.

We can also save the location of the device so that we can correctly map the infrasound that your device is recording and perform source localization.

In the absence of cell or wifi, Recorder will save to memory and retransmit when communications are restored if the backfill setting is on. A record of the communication dB level is saved when available.

You have access to all the files recorded in your device in a directory you choose during installation.

Continued use of GPS running in the background can decrease battery life.

-Access to the microphone is needed to run the app.
-The free level only supports 80 and 800 Hz audio.
-At 80 Hz, audio is heavily low-pass filtered below 32 Hz. There is no possibility of conversation or other identifiable human voicing being picked up.
-At 800 Hz audio is heavily low-pass filtered below 320 Hz - in the bass guitar frequency range, and well below the primary speech range of 1-3 kHz.
-Should you choose to use 8 kHz sampling or above at the Premium level, conversational audio could be recorded. The default privacy setting for the higher sample rates is private.
-The RedVox Device ID is either a truncated version of the scrambled vendor ID or user-specified in the settings. It is not traceable to any account or personal information.
Updated on
Jun 11, 2024

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, Personal info and 4 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

139 reviews
Ankit Kumar
June 6, 2024
Totally useless app. What's the point of recording if I can't play the audio inside? I have tried everything for the last 3 hours but nothing is playing. If anyone is reading this review and thinking of installing this app, then let it be if you do not want to waste your time and mind.
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June 6, 2024
Hi Ankit, you may have to substantially increase the volume to hear the playback - low frequency sound doesn't always map well into the audible range through phone speakers/headphones. If there is an infrasound signal, it may not match your expectations on playback
Paranoid Zkitszo
February 5, 2024
Hear (and see...)the sounds that are all around us that many of us can't hear. Or visualize those stramge noises that you do hear. Integrate data analysis with other locations/ users to put together intresting reports . Fantastic ap. Oh and the AI labelling is a intresting touch. I use this ap daiky to document my audible world around me.
2 people found this review helpful
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Jennifer Doolittle
April 17, 2024
Says that I have infrasound. But who do you have test after you have infrared sound in your area. I feel the effects from the infrasound! I especially feel it in the neck region, and it will make you sleepy. Not to mention sleep disturbances. Your house will vibrate as well. Your eyes and ears suffer as well. That 19 hertz is rather a messed up feel. So, who do you contact to find the source of your sound? I just find it odd that no one will come out to test this for me! Please help!
5 people found this review helpful
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What's new

Add ability to delete RedVox account from app settings.

Various bug fixes and improvements.