For the most functional Android App, click above link to download.zip folder. You will need to extract and install with an .apk installer. Version 3.1 is newer. Version 2.1 is for older phones that will not run 3.1
iPhone app can be downloaded at:
Download and unzip. App must be run from same folder with .dll driver file. Connect to DPV tail before running app. Battery must be plugged into tail and nose plug installed to read/change parameters.