Scam or no?

Scam?

Is the Delta mining app a scam out of Africa? I got a message request. So I look at it and they were suggesting that I consider Delta since I mine PI. They linked the white paper that I did not read but scanned over a bit of the website. Looked OK so I look for a link to download. It only has a an apk download for android and says app store for Apple.

So I go ask Google about it and not much worth looking at comes up. So I go to the play store and it's not there and I figured come ask the community that lively knows the answer.