The prediction panel on the left of the main interface displays several predictions and statistics.
Next cycle predicted on
It is the expected starting date of next period, based on some past period records.
Number of days left / Number of days late
Number of remaining days to the predicted start of next period. If current date is past the predicted start, it displays number of days late instead.
Average cycle length
Average cycle length +/- fluctuations (mathematically, they are mean and standard deviation). The statistics are computed based on some past period records, if there are enough of them. Otherwise, customizable default values are used.
Today's cycle status
Prediction on one of the following values:
- Ovulation / Fertile
- In cycle (but none of the above)
- Unknown (not past records for prediction)