Infrasound Recorder

In-app purchases
102 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
Apr 26, 2023

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

93 reviews
Slim Shady
May 5, 2023
How do u read this thing. I think I'm around an area of sonic and inferred attacks and would like to learn how to read the graphs thanks. Could u briefly state how to distinguish regular sound for infered attacks. Thank. I'll give 5 starts when your assistance is presense
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Stephanie Ann Scott
February 4, 2023
So I moved into an apartment that was making my ears ring horrible. Same for anyone who comes in the apartment. We have a power-line behind the building, and the building is very old. Just trying to figure out if this ringing is due to electrical issues in the building, old furnace? Or could this be a neighbor using low frequency sound to harass me? I didn't hear these sounds when I first moved in. The RED VOX app showed a frequency of -63 to -120. Thoughts?
5 people found this review helpful
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S Kang
October 27, 2021
Couldn't even use. It will only work if you give the app location access all the time not just while in use. They do not need my location to record a sound. Then it requires full access to the entire storage of my phone not just their folder. Deleted do to shady and suspicious permission requirements to record a sound.
22 people found this review helpful
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November 8, 2021
Hello, the where (location) and when (time) of a recording are essential for basic science. Your comment is puzzling; the app asks the user for access to a designated directory to save the files so you can verify all collected data is above board. The OS permission and app data are more transparent than ever thanks to Android's maturation.

What's new

-Key version update with substantial bug fixes, performance, and UI enhancements
-Are the machine learning model annotations bugging you? You can now turn them off in the Settings!
-Fixed login issue
-Corrected bandwidth units
-Additional sensors, sample rates, and customization at higher tiers