ViewPipe is a free Android app developed by Green Hat People that aims to improve engagement and opinion-sharing during meetings and corporate events. With a simple interface, users can anonymously send messages while listening to lectures or attending workshops. All messages are displayed in an online feed that can be monitored by event organizers or projected on screens for everyone to see.

To use ViewPipe, event administrators need to obtain a unique code that is used to identify the correct event. The app offers free and premium features such as data analysis and customization options that allow you to design the app with your colors and logo. The app is easy to use and can help organizations to collect valuable feedback from attendees.

Overall, ViewPipe is a great tool for boosting audience participation and facilitating anonymous opinion-sharing during corporate events.