For Android:

This behavior can be bypassed by following the migration guide: https://flutter.dev/docs/release/breaking-changes/network-policy-ios-android .

or... Just add android/app/src/main/AndroidManifest.xml:

android:usesCleartextTraffic="true" to <application /> also don't forget to take INTERNET PERMISSION :

 <uses-permission android:name="android.permission.INTERNET" /> <!-- This Line --> <application android:name="io.flutter.app.FlutterApplication" android:label="receipt" android:usesCleartextTraffic="true" <!-- This Line --> android:icon="@mipmap/ic_launcher">

For iOS:

Allow insecure/HTTP requests globally in your app on iOS, you can add this to your ios/Runner/info.plist under the main dictionary definition:

 <key>NSAppTransportSecurity</key> <dict> <key>NSAllowsArbitraryLoads</key> <true/> </dict>

Please note that you will need to have an explanation for the Apple review team when enabling this, otherwise your app will be rejected upon submission.

Thanks.

1. Navigate to your project.
2. Go to yourapp\android\app\src\debug\AndroidManifest.xml.
3. Add this line.

<application android:usesCleartextTraffic="true">
</application>

For further details, follow this link.

This problem is solved here.

https://flutter.dev/docs/release/breaking-changes/network-policy-ios-android

You just need to change the HTTP to HTTPS. Like this

Response response = await get('https://worldtimeapi.org/api/timezone/Africa/Nairobi');