Made this Kiosk setup for my Maker Faire exhibit which involves an iPhone 6 and 7 Plus and my app which controls an LED display over Bluetooth. As you can see in the video, the stand is pretty heavy duty and does not tip over when the users are using the app. It weighs 1 lb , 1 ounce.
Design files and Instructable here https://www.instructables.com/id/IPhone-67-or-8-Plus-Kiosk-Stand-Laser-Cut/