I was thinking that with a browser the need for on-phone apps is significantly reduced. If one does want or need native apps (e.g. for security), then is it po

I was thinking that with a browser the need for on-phone apps is significantly reduced. If one does want or need native apps (e.g. for security), then is it possible for a third party to emulate Google Play Services? Or do they use a certificate to prevent third-party clones?