Glow won't predict my periods

So, I have pretty irregular periods, but my apps usually are somewhat accurate. By a few cycles ago glow just stopped completely.
Why is it doing this? It's really annoying. Thanks ^^

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors