Mobile exercises no longer syncing to Web?

[aquwa]

I've been using Duolingo on iOS to practice lately, to come back to the website and find that I have lost a streak because I did not do any exercises, when I in fact did.
The app also will show that I did not do any exercises, even when the day before or earlier that day it showed that I was "on track" and had completed exercises that day.

[Andrea6031]

I just started this several days ago on my IPhone and now sitting at my computer, I seem to have the same problem.....it's like it does not know what I've already done. What to do??