Echo Meter Touch Bat Detector3.1.13 - App Store

Using the Echo Meter Touch 2 Pro plug-in module, this app allows you to listen to record and automatically identify bats by their ultrasonic echolocation calls. The module and this companion app reveal the silent and often times invisible world of bats, providing outdoor enthusiasts, citizen scientists, and researchers an affordable and informative way to interact with these important creatures. There are two models: Echo Meter Touch 2 (EMT 2) is intended for nature enthusiasts and batting hobbyists and Echo Meter Touch 2 Pro is designed for bat professionals and features a higher quality microphone, adjustable gain, and higher sample rate.

The Echo Meter Touch Ultrasonic Module senses ultrasonic signals, digitizes the signal, and transmits the ultrasonic data to the app on your iOS device.

LISTEN TO BAT’S ECHOLOCATIONS
EMT2 translates bat echolocations into frequencies that are audible to humans using two technologies. Wildlife Acoustics’ patented Real Time Expansion (RTE) allows you to listen to bats in real time with unparalleled fidelity. RTE maintains the timing and tonality of the original echolocations. Heterodyne (HET) listening via manual and automatic tuning is also available, for those accustomed to that way of hearing bats.

VIEW THE ECHOLOCATIONS ON A SPECTROGRAM
A real-time spectrogram shows the frequencies and timing of the echolocations. Scroll back in time and zoom in on previous "bat passes."

SEE MOST LIKELY BAT SPECIES IN REAL-TIME***
The Auto ID feature analyzes the echolocation calls and suggests the two most likely bat species matches in real time. This is the same technology used in our professional Kaleidoscope Pro Bat Auto Identification software. Currently, the app can identify 26 species in North America, 25 in Europe and 57 in the neotropics. For more information on Kaleidoscope and a full list of species, visit our website.

RECORD .WAV FILES
Activate triggered recording mode to automatically save bat passes to full spectrum .wav files for analysis on a computer or to view on your iDevice. Or use manual record mode to control start and stop of recording. View the recording spectrogram and add voice or text notes. Listen to the recording using RTE, HET, or traditional Time Expansion Playback (playback at fractional speed to make the ultrasound audible).

SEE YOUR PATH AND RECORDING LOCATIONS
View in satellite or road map view. View identified species codes directly on the map. Go to the recording's spectrogram from the map view. Transfer to your computer to view in Google Earth. Your iDevice must have GPS capability or you must use a Bluetooth GPS receiver for this functionality.
*Continued use of GPS running in the background can dramatically decrease battery life.*

TRANSFER RECORDINGS TO YOUR COMPUTER
The EMT 2 can transfer the .wav recordings to your computer over a Wi-Fi network or using a USB cable.

SHARE RECORDINGS VIA EMAIL OR MMS MESSAGING
And import and open files that have been shared with you.

***Because bats vary their echolocation calls in response to a wide variety of needs, no automated identification can achieve 100% accuracy in species identification. Auto-ID, though largely accurate, should not be relied on as a basis for scientific research. Auto-ID is intended for use in analyzing recordings of single bats in free flight in low clutter environments. Auto-ID will not work well on recordings of roost emergence, multiple or captive bats, bats in high clutter environments, or bat social calls. Auto-ID does not include every possible bat for each of the covered regions.

Echo Meter is a registered trademark of Wildlife Acoustics, Inc.

Version History +Minor big fixes. 3.1.13 Aug 25 +Adds a menu item on the Information screen to create an app debug log to assist us in understanding and fixing app issues. 3.1.12 Aug 7 +Several bug fixes. 3.1.11 Jun 26 +Now allows playback through Bluetooth devices. Live monitoring through Bluetooth is not technically possible with the audio streaming from the EMT module. 3.1.10 Jun 9 +Newly formatted user guides. 3.1.9 May 16 +Improves compatibility with iOS 26 Liquid Glass.
+Minor bug fixes. 3.1.6 Apr 29 +Several crash fixes and minor improvements. 3.1.2 11/01/2025 +Fixes an issue with erroneous Auto-ID results when using 384kHz sample rate.
+A few crash fixes. 3.1.1 09/14/2025 +Added spectrogram smoothing setting (enabled by default).
+Added FFT size setting (default: 256, matching previous versions).
+Updated bat classifiers from the new Kaleidoscope version 5.7.0.
+Newly formatted user guides.
+Minor bug fixes. 3.1 08/23/2025 +Fixes some items not working on the App Info screen. 3.0.5 11/19/2024 +Minor bug fixes. 3.0.4 10/16/2024 +Minor fixes. 3.0.3 08/21/2024 +Minor bug fixes. 3.0.2 06/15/2024 +Minor bug fixes. 3.0.1 05/10/2024 Big news! EMT 2 and EMT 2 Pro bat detectors with USB-C or Micro USB connectors are now compatible with iPhones and iPads with USB-C ports. If you own an EMT 2 with USB-C or Micro USB, simply plug the module in to see upgrade instructions. You can then use the EMT 2 with your iOS device (EMT 2 with Micro USB will need an adapter). Wildlife Acoustics will soon begin shipping EMT 2 bat detectors with USB-C with the new firmware already installed and ready to use on any platform. 3.0 04/04/2024 +Several crash fixes.
+Improvements to recording flag location behavior in GPS View.
+Fixes not being able to import recordings downloaded via AirDrop on iOS 17. 2.8.25 01/09/2024 +Increases recording limit to 20,000 recordings.
+Fixes a couple of crashes.
+Better handling of audio when Bluetooth headphones are connected. 2.8.24 11/21/2023 +Minor bug fixes and enhancements. 2.8.23 08/09/2023 +Fixes a bug with screen rotation on iPhone 8 Plus. 2.8.22 05/17/2023 +Minor bug fixes. 2.8.21 03/30/2023 +Minor bug fixes. 2.8.20 03/06/2023 +Minor bug fixes. 2.8.19 12/05/2022 +Now allows import of zip folders output via Airdrop.
+Minor bug fixes. 2.8.18 10/24/2022 +Fixes an issue where the screen would not auto-rotate under some circumstances.
+Fixes voice notes being garbled when they are recorded while running in Live Mode.
+Transferring a recording session to a Mac computer using Airdrop will now result in a kml file of the recordings and path, just like when you transfer using Wi-Fi.
+A couple of crash fixes. 2.8.17 09/28/2022 +Fixes the hidden clock and battery meter at the top of the screen. Sorry!
+Fixes clicking through recording spectrograms does not follow the same order as the sorting on the recording list.
+A couple of crash fixes. 2.8.16 09/03/2022