Anonymous2 months ago-101Hello, is it possible to start up and install the device without the app or is the app mandatory? Thank you. Show in original language (German)Anonymous2 months ago • purchased this product000purchased this productNot absolutely necessary 👍🏻Show in original language (French)CommentRoman-Frei2 months ago • purchased this product000purchased this productThe device has a built-in touchscreen which - as far as I know - supports all the functions provided by the app.Show in original language (German)Commenthu.fehr2 months ago • purchased this product000purchased this productGood dayInstructions are included. I have put the device into operation without the app and do not use the app in daily use either. MfG.Show in original language (German)Comment