QuizPig is an iOS and Android single player quiz game which I developed to gain some experience fully concepting, designing, building and releasing my own mobile app. It was built using React Native.
Unfortunately the app is no longer available for download on iOS as Apple charge £99 every year just to keep your apps live, and it was just wasn't worth it for me to pay for more than one year when renewal came around. You can still download QuizPig for Android though on the Google Play Store.
You can read the QuizPig privacy policy here.