This App is mandatory to control and set up ELOC devices which are bioacoustics recorder/listener.For now the ELOC-S is only able to act as a bioacoustic recorder. You can find more information on https://wildlifebug.comAfter you connect to the device via Bluetooth you will be able to:- Start / Stop recording- Change sample rate (8K, 16K, 22K, 32K, 44K)- Set recording time per file- Set microphone gain- Set file header- Change device name- Upload metadata from each recorder