Cycle Tracker
Log your periods and see your fertile window clearly. Built for women trying to conceive — with the clinical accuracy your journey deserves.
What it does
- ✓Period logging — record start and end dates; the app builds your cycle history automatically
- ✓Fertile window prediction — based on your personal cycle length, not a fixed 28-day assumption
- ✓Cycle calendar — visual month view showing predicted fertile days, ovulation day, and next period
How it works
- 1
Log your period start date
Tap the date your period began. Do the same when it ends.
- 2
Build your cycle history
After 2–3 cycles, the app learns your average cycle length and adjusts fertile window predictions to your pattern.
- 3
Plan around your fertile window
The calendar highlights your most fertile days for the coming month so you can time intercourse for the best chance of conception.
Frequently asked questions
How is the fertile window calculated?
Ovulation typically occurs 14 days before the next period. For a 28-day cycle, ovulation is around day 14. The fertile window spans the 5 days before ovulation and the day of ovulation itself — 6 days total. Sperm can survive up to 5 days in the reproductive tract, making pre-ovulation timing effective.
What is a normal menstrual cycle length?
A normal cycle is 21–35 days. The average is 28 days, but significant variation is normal. The luteal phase (ovulation to next period) is relatively fixed at 12–14 days; it is the follicular phase that varies between women and cycles.
How many cycles should I track before trying to conceive?
Track at least 2–3 cycles to understand your pattern before relying on fertile window predictions. If cycles are very irregular, consult your OBG doctor — conditions like PCOS can affect ovulation and may require evaluation.
Can the cycle tracker detect PCOS?
No — the tracker records your data but cannot diagnose conditions. Very irregular cycles (varying by more than 7–9 days) or very long cycles (>35 days) are worth discussing with your doctor, who may recommend hormone testing or an ultrasound.
When should I see a doctor if I am trying to conceive?
If you are under 35 and have been trying for 12 months without success, see a doctor. If you are over 35, see a doctor after 6 months. If you have known conditions like PCOS, endometriosis, or irregular cycles, consult a doctor earlier — do not wait 12 months.
Cycle Tracker is part of the Janani app — free to download on Android.