there are lots of app on internet and on google app store that offer minning on mobile but it is very difficult to minne some coin on mobile however ETN offer you mobile minnig you can earn 5 t7 coins per day that is good earning monthly but but there some bad thing with this app it will make your mobile slow and hang your mobile sometime but this app is official and very safe and very different dispite of other apps and this is feature your free money