Is this kukai wallet? I don't find in google Play ... @KukaiWallet

Yes, Kukai is a wallet, but it is not available on the Google Play Store. Instead, you can access it via your web browser on your mobile device. Kukai is an optimized web app that works on both desktop and mobile browsers, so you can use it on all your devices. It is a secure and convenient way to store and manage your digital assets.

Kukai a web app optimized for both desktop and mobile browsers, it would on all your devices

Yes it is. At the moment Kukai is not available for Google Play store. But you can still use it via browser on your phone