How to develop a Stopwatch in React JS with custom hook - DEV Community
GitHub - men32z/react-native-countdown-timer: The Countdown Timer mobile app was built using React Native with Expo. It's simply a countdown timer that allows users to add minutes and then start, pause, or accelerate
GitHub - drahmel/youhavetimer: Timer and stopwatch React-Native app for iOS and Android
android - How to delimit TextInput for timer input in React Native - Stack Overflow