Why is my app stuck in follicular phase or showing a long fertile window?

If your Tempdrop app still says you're in the follicular phase or shows that your fertile window is open, even though you think you've already ovulated, don’t worry, this usually just means the app is waiting for more data before it can confirm ovulation.

How ovulation is confirmed in the app

To move from Follicular to Luteal phase, the app looks for a valid temperature shift. This shift is marked by:

• A red cover line and series of high temperatures above it

If that pattern hasn’t been detected yet, your chart will stay in the follicular phase. This suggests that ovulation may be delayed or that the temp shift is not clearly defined. 

Already see a temperature shift?

If you’ve already noticed a temp rise but the app hasn’t confirmed ovulation, one possible reason is that the Cervical Mucus (CM) cross-check option is turned on.

When this setting is enabled (under Settings > App Settings), the app also looks for a valid Peak Cervical Mucus day (P123 on the chart) around the time of the temperature shift. If it can’t find one, it will hold off on confirming ovulation. 

To help the app detect a Peak day:

• Log cervical mucus daily
• Even enter “none” or “dry” on dry days — this helps define the pattern

If using this cross check isn’t important to your needs, go to settings and turn it off. The app will then use only temperatures to verify ovulation and move to the luteal phase. 

In short:

Your app may be stuck in the follicular phase or keeping your fertile window open because:

• A valid temperature shift hasn’t occurred yet
• CM cross-check is enabled, but no valid Peak day has been identified
• Ovulation is delayed or the pattern is less clearly defined this cycle
• Timing between peak day and temperature shift is too far apart

I am using the CM cross-check feature and have both a peak day and a temperature shift. Why has the app not moved to the Luteal phase? 

If your chart shows both a valid Peak Cervical Mucus day and a temperature shift, but the app still hasn’t confirmed ovulation, the timing between the two may be too far apart.

In typical cycles, these two signs appear close together. If they’re too far apart, the app takes a conservative approach and won’t confirm ovulation. This helps avoid incorrectly marking a phase shift when the data may point to an unclear or atypical pattern.