I don't think the Destiny Companion app needs any fixing other than bugs. After all, no one would ever visit the tower if the app included things such as obtaining and handing in bounties, decrypting engrams, buying items from vendors, and even handing in quests from rewards. If these things were made possible in the Destiny Companion app, what would the use of the tower be if people could just do everything except play the game from their phone?