Ive had nothing but really good experiences with this app so far. It will bug you every login to "upgrade", but you dont have to. I recommend that, though, in case you lose access somehow and you are not backed up somewhere; my old phone died and the old version of the app did not carry over and my account was the free version so they could not "recover" my account and I had to create a new one. But that was my fault, and for me, the paid upgraded version will be worth it to me in the future. Ive not experienced any bugs, glitches or other issues.