Why don't they have an in between?

Avery
I wish that <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> had an in between 2 and 5 days for when u want them to ask u about your period. I think that like 3 days would be good because I think 1 is to little and 5 is to much. It's such a big jump. Anyone else agree?