App.tsx

import React from 'react';
import { Button, View, StyleSheet } from 'react-native';
import useCountdownTimer from "./components/useCountdownTimer";

const App = () => {
  const { resetTimer } = useCountdownTimer();

  return (
    <View style={styles.container}>
      <Button title="Restart Timer" onPress={() => resetTimer(600)} /> // you can give the value for timer based on your need
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    backgroundColor: '#ecf0f1',
  },
});

export default App;