Flo has 70 million users and a solid period prediction algorithm. But your cycle doesn't live in isolation — it affects your sleep, mood, energy, exercise performance, and nutrition. tr8ck tracks the full hormonal health picture in one app.
Join Free WaitlistNo credit card. Free during beta.
Flo is best for cycle and pregnancy tracking with a large content library. tr8ck is the better fit if you want cycle tracking plus 12 more health modules — sleep, mood, medication, nutrition, energy — with AI that shows how your cycle connects to everything else. Free covers 4 modules; Pro is $4.99/mo, Premium $6.99/mo adds AI insights.
With 70+ million users and over a decade of data, Flo's period prediction is polished and reliable. It also includes symptom logging and some health articles. The limitation is that Flo's data is entirely siloed — your cycle data doesn't talk to your sleep, nutrition, exercise, or medication data, because Flo doesn't track those things.
| Feature | Flo ~$13/mo premium | tr8ck Free beta |
|---|---|---|
| Period prediction | ✓ Excellent, 13+ yr data | ✓ After 2-3 cycles |
| Cycle & ovulation tracking | ✓ Core feature | ✓ Full module |
| Symptom logging | ✓ Detailed | ✓ Yes |
| Health articles & content | ✓ Extensive library | – Focus is data, not content |
| Sleep quality tracking | ✗ No | ✓ Full module |
| Mood tracking | ✓ Basic symptom log | ✓ Dedicated module |
| Nutrition tracking | ✗ No | ✓ Full module |
| Exercise tracking | ✗ No | ✓ Full module |
| Medication / GLP-1 tracking | – Pill reminders only | ✓ Full module |
| AI cross-metric insights | ✗ No cross-correlation | ✓ Personalized AI |
| Price | ~$13/month premium | Free (beta) |
Each phase of your cycle — menstrual, follicular, ovulatory, luteal — creates different hormonal environments that affect your energy, sleep architecture, mood baseline, and exercise capacity. tr8ck tracks what's happening in each phase across all your health metrics.
tr8ck tracks your sleep quality, pain levels, mood, and energy during menstruation — so you can see patterns across cycles and plan accordingly. Flo logs symptoms but doesn't connect them to your other health data.
Rising estrogen boosts mood, energy, and exercise capacity for many women. tr8ck lets you see whether your mood scores and workout performance actually track with your follicular phase or vary in your specific pattern.
Your body is doing something significant around ovulation — and it shows up in your data. tr8ck logs temperature, mood, energy, and exercise performance so you can identify your personal ovulatory patterns.
The luteal phase brings PMS for many women — mood shifts, sleep disruption, food cravings. tr8ck tracks these changes against your nutrition, sleep, and exercise data so you can manage the phase more effectively.
Women on Ozempic, Wegovy, or Mounjaro sometimes experience cycle irregularities — changes in period timing, flow, and PMS severity. These changes are often not tracked because Flo doesn't know about your medication. tr8ck tracks your GLP-1 dose alongside your cycle so you can see if and how they're correlated.
Explore the cycle module →Track your cycle alongside sleep, mood, nutrition, and medication. Free during beta.
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