If you are looking for an easy to integrate built in solution. You can use App Upgrade (Google it, url is not permitted here) service to force update you mobile apps. You need to create new version for your app versions you want to update in the app upgrade service and select whether you want to force it or just want to let users know that new version is available. after this you will need to call the appupgrade api from your app with the required details such as your app version, platform, environment and app name. The API will return you the details.. that this app needs to be updated or not. Based on the response you can show popup in your app.You can call this API when app starts or periodically to check for the update. You can even provide a custom message. API response: See the response has force update true. So handle in the app by showing popup.  You can find the complete user documentation in the website. Thanks.