Android - Android is an open source mobile operating system initially released by Google in 2008 and has since become of the most widely used operating systems on any platform.
KidHab - Develop useful habits in your kid together
PureOS - A user friendly, secure and freedom respecting OS for your daily usage
Fitbit Ace - Fitness fun for kids
CalyxOS - Privacy-focused operating system for smartphones based on Android and microG
Kids in Touch - A safe, fun, messaging app for kids monitored by parents