When I downloaded the app (which is supposed to make "Youtube" videos download faster. After I hit install, I got a 2 message. One said they need to access my PIN and phone model, I agree that is ok.
The second message said that that I am granting FastTube permission to access all of my emails and all of my texts! I could not uncheck the checkbox in the 2nd message and did not press ok...go ahead and download the App. It downloded itself into my phone and now, has access to my email and texts. This app is highly rated.
Since this is a native app, you can revoke these permissions by going to Settings>Security and Privacy>Application Permissions. Look for this app in the list and then proceed.