Is Vivaldi browser safe to use? and is it available to android google play?
Currently I am using Opera
Yes it is safe! No, it's not yet available for Android, but probably in the future it will be.
@markchristian796 building a mobile version of Vivaldi is in our pipeline.
Ahan, regarding your first question, I'd like to ask safe from what exactly? If you mean like it has incognito mode so your history doesn't get public with other users of that same device (desktop PC for instance) then yeah, it's pretty safe to use. If you meant to ask if you're using it to make online transactions and if they're safe, like if they're secure or encrypted, then no, vivaldi, for now, does not offer a built-in encryption or vpn type of thing.
About yoru second question, no it does not offer one for Android. At least I was able to find absolutely nothing with a "Vivaldi Browser" query over my Android Playstore.