Unfortunately the R2R app and Taptalk support have been discontinued. More information as to why and how to navigate the forum on mobile can be found in this thread here
UPDATE: PLEASE BEAR WITH US HERE! WE ARE IN TALKS FOR OUR OWN NEW APP COMING NEXT YEAR! Some of you use the R2R Tapatalk Branded App and Tapatalk App and we have tried to keep it working as long as possible. But I recently found out that the company who makes the app (Tapatalk) has started to...