Chrome launched Chrome apps three years ago. Today, approximately 1% of users on Windows, Mac and Linux actively use Chrome packaged apps, and most hosted apps are already implemented as regular web apps.
Google will be removing support for packaged and hosted apps from Chrome on Windows, Mac, and Linux over the next two years.
Starting in late 2016, newly-published Chrome apps will only be available to users on Chrome OS. Existing Chrome apps will remain accessible on all platforms, and developers can continue to update them.
In the second half of 2017, the Chrome Web Store will no longer show Chrome apps on Windows, Mac, and Linux, but will continue to surface extensions and themes. In early 2018, users on these platforms will no longer be able to load Chrome apps.
Developers can use this migration tool to migrate their Chrome apps to the web.
Migration tool : developers.chrome.com/apps/migration