Could you please tell us some information so that we may fix it sooner:
1. "...sync of tasks are working bad" -- Do you mean for every sync between web and iPhone, it's slow? Could you give us an example? Please be noticed that auto sync on iPhone runs every 3 to 5 minutes.
2. Is email@example.com another account? How can you make sync with another account?
3. What's your phone model? And what's your iOS version? If it's iOS9, then there is the slow problem and we've fixed it in the coming version which is now being tested.
Look forward to your reply.
If I made any misunderstandings, please also tell us.
Hi after update sync of tasks are working bad :-( we are disappointed