Tapatalk is a popular app, but it's default setting is to add a line like Sent from my <users phone model> using Tapatalk at the end of each and every post made. For those Tapatalk users that have not yet disabled adding Signature to posts, please do so! Edit: I don't have the app myself but on their forum there are some instructions: https://www.tapatalk.com/groups/tapatalksupport/remove-hide-sent-from-my-using-tapatalk-s-t40687.html "The user can set it [from the app] in Me>Settings>signature. " Another: "This signature only appears if people are using the app, so they have to edit the settings in the app. Copying & pasting what I wrote our members: Follow the little arrows at the upper left corner of your app's screen, until you left the board and are in your own menu. At the upper right, there's a person icon - click it. Choose "settings". Choose "signature". Disable the signature, or at least remove the sentence about your phone. "