diff --git a/src/components/countdown.js b/src/components/countdown.js
index a71295c..c99107b 100644
--- a/src/components/countdown.js
+++ b/src/components/countdown.js
@@ -213,6 +213,7 @@ class CountDown extends Component {
       toValue: 1,
       duration: 1000,
       easing: Easing.linear,
+      useNativeDriver: true,
     }).start(() => {
       const {seconds, minutes, hours} = this.state;
       if ((seconds || minutes || hours) && !this.props.pause)
@@ -226,6 +227,7 @@ class CountDown extends Component {
       toValue: 1,
       duration: 1000,
       easing: Easing.linear,
+      useNativeDriver: true,
     }).start();
   }
 
@@ -295,12 +297,12 @@ class CountDown extends Component {
     // if (this.props.endingAlert?.animate)
     //   this.alertAnimate();
 
-    AppState.addEventListener('change', this._handleAppStateChange);
+    this.subcription = AppState.addEventListener('change', this._handleAppStateChange);
   }
 
   componentWillUnmount() {
     clearInterval(this.timer);
-    AppState.removeEventListener('change', this._handleAppStateChange);
+    this.subcription.remove();
   }
 
   render() {