Since November 8th the eWeLink app has been removed from the Play Store by Google. eWeLink worked hard to get this issue solved and provided an APK file to manually install eWeLink 4.17.0. Since today this workaround is not necessary anymore as Google approved eWeLink 4.17.0 for the Play Store.
You can always check for the latest release of the eWeLink app for your mobile operating system on our App releases page. We only update the version number when the update is available to us as maintainers of this website.