If a certain app is slow, try these app-specific troubleshooting steps.
If your phone is slow when viewing online content, it could be an issue with your connection. If you're on Wi-Fi, use a different Wi-Fi network, switch to mobile data or contact your Internet service provider. If you're using a mobile connection, switch to Wi-Fi.
If all apps are slow, it's probably an issue with your phone, not an app on your phone. Try these troubleshooting steps. After each step, check to see if the issue has been fixed:
Turn your phone off and then on again.
Check for system updates.
Go to Settings > System updates.
Check for app updates.
Open the Play Store app and touch your profile icon 