I just recommend textra to a friend and they wanted to go ahead and purchase the pro version, went through all the settings, looked on the play store, couldn't find anything to go head and update to the pro version. Finally I had to look and found out that there's 14 days before ads start and before it asks you to upgrade. I couldn't even find this information on the app itself. It would even be helpful if there was a tracker that gave you which day you were on in your trial.