No sound on video. Not working on iPad – Private Browser - Web Browsing Review

Video plays in YouTube. However, there's no sound in any of the videos I tried, and I tried hundreds of them. Also, it doesn't work on my iPad Air 2. The app gets stuck on code input, but can't input any codes because the keyboard doesn't get activated. Additionally, the app crashed on my iPhone 6s Plus when trying to go to a different website. The download button redirects to the App Store. The app is just terrible. I wonder how this app gets rated with more than 1 star.
Review by Perryyuchu on Private Browser - Web Browsing.