https://www.theverge.com/2018/7/26/17619566/google-play-ban-apps-mine-cryptocurrency

Google has updated its Play Store developer policies to ban several more categories of apps, including cryptocurrency mining ones and apps with disruptive ads, as reported by Android Police.

When it comes to cryptocurrency apps, Google says mining apps are now prohibited, but apps that “remotely manage the mining of cryptocurrency” are still permitted. Apple recently banned apps that mine cryptocurrency, stating that, “the only cryptocurrency mining apps allowed are those that mine outside of the device, like cloud-based mining.”