Cycle tracking in Belle Cycle App

The Belle Cycle App turns daily logging into a picture of your own rhythm — not a textbook 28-day average, but the cycle your body actually runs. Here’s what it tracks and how to read what it shows you.

What «cycle tracking» means here

Cycle tracking in the Belle Cycle App is the running record of where you are in your cycle, what you log along the way, and the patterns Belle finds once it has enough of your data. You tell it the start of your period, log symptoms as they happen, and the app maps those against your phases — menstrual, follicular, ovulatory, luteal — over time.

What it won’t do on day one is announce your phase with false confidence or predict your next period to the exact date. The average cycle is closer to 29.3 days than 28, the real range runs 21–35 days, and yours is its own thing. Belle needs 2–3 cycles to learn your baseline before its predictions hold up.

Setting it up

When you first open the app, Belle asks three things: where you are in your cycle right now, what conditions you’re tracking, and what you want to understand. Your answers shape what the app watches for — tracking for PCOS looks different from tracking a regular cycle.

To start tracking, log the first day of your most recent period. From there, mark each new period as it begins. The more consistently you log period start dates, the faster Belle’s predictions sharpen.

Logging day to day

Daily logging takes about 30 seconds and is mostly tap, not type. You record:

• Flow — spotting through heavy, on bleed days
• Symptoms — cramps, mood, energy, sleep, headaches, and more
• Notes — anything you want to remember that doesn’t fit a category

You don’t have to log every day for tracking to work, but symptom patterns get clearer the more you give the app. If you wear a Belle Ring, its biometrics — skin temperature, heart rate, HRV, sleep — layer onto your manual logs so the app can confirm what your symptoms are telling it.

Reading your cycle view

The main cycle view shows your current day, your predicted phase, and a calendar of past and upcoming cycles. Once Belle has 2–3 cycles, you’ll see predicted period and fertile windows, plus which symptoms cluster in which phase. Predicted dates are estimates, not promises — they tighten as your history grows, and they shift if your cycle does.

If you’re tracking a specific condition like PMDD, the app uses the same screening tools a clinician would — the PSST and DRSP, two standard symptom questionnaires — to flag luteal-phase patterns. That’s covered in more depth in How Belle tracks PMDD.

What to do next

Log today’s symptoms, then check back after your next period starts. Two or three cycles in, open your cycle view and see what Belle has learned about your rhythm — that’s when the picture starts to be genuinely yours.