I just bought premium and realized I made a mistake right away! It told me to register to sync my data and I did. Sync option wouldn't do anything. I wasn't able to set a username because of some unknown error all the time. Then half the screen was empty and I decided it was a glitch and reinstalled it and now ALL MY DATA IS GONE! So stupid! I just paid 10 bucks to be able to create more than 5 habits and I lost everything! Don't recommend this app, so disappointed...