Period & fertility
September 2026
MoTuWeThFrSaSu
Logged periodPredicted periodFertile windowOvulation
Tap any day to log or clear bleeding. Predictions relearn from your logged periods automatically.
Symptom heatmap
Every row is one cycle, aligned to day 1, so repeating patterns line up vertically. Log symptoms to fill it in.
1510152025
24 Apr
22 May
19 Jun
17 Jul
14 Aug
11 Sep
MenstrualFollicularOvulationLutealDeeper colour = more symptoms that day
Log a period
Pick the day your bleeding started and, once it's over, the last day. Leave the end date empty if your period is still ongoing.
Typical flow
Recent periods
No periods logged yet — add your latest one above.