Bat Detector

Bat Detector

Listen to and record bats

2 ratings
5 reviews
Free

Details

  • Released
  • Updated
  • June 13, 2024
  • April 30, 2026
Bat Detector video #1 for iPhone
Bat Detector screenshot #2 for iPhone
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Bat Detector screenshot #6 for iPhone
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About

Listen to and record the ultrasonic sounds of bats using your iPhone or iPad. This app reveals bat acoustics through heterodyne detection and 16x time expansion, making their calls audible and musical. It also offers full-spectrum recordings triggered by bat sounds.

Heterodyne bat detection without manual tuning
16x time expansion for audible bat sounds
Full-spectrum recordings triggered by bat sounds
Real-time sound demodulation
Preserves harmonic relationships in bat calls
Supports European and global microbats
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What's New in Bat Detector

2.7

April 30, 2026

Improved interference suppression / noise reduction, results in better reproduction of time expanded bat calls. Switchable "Griff" filter introduces a band cut at 27kHz to match the resonant peak of Griff's FORD-2 microphone.

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User reviews

Demo mode

It says to turn demo on/off go into settings yet the doesn’t seem to be any settings.

Excellent

Works well with a pippyg configured as a usb mic.
I can only assume the 1 stars are from people who never found the mic enable setting

Demo mode

Wanted to love this but it only ever said demo mode and there is not documentation or settings to speak of.

Response from developer

This is wrong, and was clearly written before the recent updates. The user could not work out how to exit demo mode, and there is now an obvious button on screen to enter settings, and in addition the app no longer boots in demo mode on the first run.

Terrible app

It just repeats a bat recording. Also, you can’t buy the bat detector assembled or in parts if you live in America.

Response from developer

This is wrong, and was clearly written before the recent updates. The user could not work out how to exit demo mode, and there is now an obvious button on screen to enter settings, and in addition the app no longer boots in demo mode on the first run. The parts to build a device are available in the US, but the PCBs must be imported from China, but are extremely cheap - $5 for 10. In addition, manufactured items are now available in the US from Apodemus resellers.

Whale by songs

Amazing

Developer apps

FAQ

How does Bat Detector make bat sounds audible?

Bat Detector uses two primary methods: heterodyne detection, which demodulates ultrasonic sounds into audible clicks and pops in real-time, and 16x time expansion, which slows down bat calls to a musical range while preserving their harmonic relationships.

What kind of microphone do I need for Bat Detector?

You will need to connect an inexpensive ultrasonic USB microphone to your iPhone or iPad. The developer provides links to build your own for under £10 or purchase a pre-assembled unit.

Can Bat Detector identify specific bat species?

Yes, Bat Detector aids in species identification by preserving the rhythm of bat calls through heterodyning and the musical structure of sounds through time expansion. The accurate frequency readout on the display further assists in this process.

Does Bat Detector have ads?

No, Bat Detector does not contain advertisements. It is a free application designed for educational and exploratory purposes.

What devices are compatible with Bat Detector?

Bat Detector is compatible with iPhone, iPad, and iPod devices. It requires an iOS version that supports the latest app updates.

How often is Bat Detector updated?

The latest version of Bat Detector is 2.5, last updated on February 3, 2026. This indicates a recent update, suggesting ongoing development and support.

What is the age rating for Bat Detector?

Bat Detector has an age rating of 9+. This suggests that the content and complexity of the app are suitable for users aged 9 and above.

Does Bat Detector offer certifications for learning about bats?

The provided information does not mention any certifications offered by Bat Detector. Its primary function is to facilitate the listening and recording of bat sounds for educational exploration.