Few days ago Google Release this app on play store for Android . I have a Marshmallow Device so I Download it . This app is less than 1MB so it’s not consume too much memory. KitKat device are not supported this app and few lollipop device will be support. You need to be a beta tester of Google app and this app only launch Google assistant. Like Bixby button. It has no such a feature so I prefer do not download it.