Phasly vs Flo, an honest comparison
Phasly vs Flo compared honestly. Flo is a period and health tracker. Phasly is a cycle-aware workout app with a period tracker, an AI coach and workouts for 10 cycle modes.
The short answer
Flo and Phasly solve different problems. Flo is one of the best-known period and health trackers, with predictions, symptom tracking and pregnancy and perimenopause tools in Premium. It does not plan or log workouts. Phasly is a cycle-aware workout app with a period tracker built in: your cycle sets the baseline, your daily check-in adjusts the day, and Phoebe, an AI coach, builds your workouts.
Both have a free cycle tracker. Phasly's adds LH tests, a free doctor's report and all 10 cycle modes for free. Flo has 3 modes, natural cycle, perimenopause and pregnancy, and the last two sit behind Premium. If you want your training to follow your cycle, that is what Phasly is for. Phasly launches in November 2026 on iOS and Android.
Phasly vs Flo at a glance
| Phasly | Flo | |
|---|---|---|
| What it is | A cycle-aware workout app with a period tracker | A period, fertility and health tracker |
| Period and ovulation predictions | Yes | Yes |
| AI you can talk to | Phoebe, an AI coach for training, recovery and fuelling | A virtual Health Assistant in Premium, for health questions |
| Plans your workouts around your cycle | Yes, your cycle sets the baseline and your daily check-in adjusts the day | Not mentioned |
| Exercise library and your own workouts | 290+ moves, plus your own, on a workout calendar | Not mentioned |
| Log sets, reps and weights | Yes, with history and personal records | Not mentioned |
| Life stages | 10 modes, including the pill, IUDs, implant or shot, PMOS (PCOS), perimenopause, menopause, pregnancy and postpartum, each with its own training rules. All free in the tracker | 3 modes: natural cycle, perimenopause and pregnancy. Perimenopause and pregnancy in Premium |
| Pregnancy planning (LH tests, BBT) | LH tests and BBT free. Chance of conception in Plus | BBT free. No LH tests. Chance of conception in Premium |
| Cycle report you can download | Yes, a PDF for your doctor, free | A doctor’s report in Premium (iOS) |
| Price (US) | Free cycle tracker. Plus $14.99 a month or $89.99 a year, 30 days free on the yearly plan | Free cycle tracker. Premium $14.99 a month or $59.99 a year, 14 days free on the yearly plan. Family plan for up to 6 people $79.99 a year (October 2026) |
Flo details come from the Flo iOS app (checked 24 October 2026), its App Store listing and independent checks on the dates shown. Apps change, so check the store before you decide. Green marks where Phasly gives you more.
The cycle tracker, side by side
What each app’s tracker does, and what sits behind Flo Premium or Phasly Plus.
| Phasly | Flo | |
|---|---|---|
| Period and ovulation predictions | Free | Free |
| Calendar and cycle history | Free | Free |
| Symptom tracking, including discharge | Free | Free |
| Fertile window | Free | Free |
| Basal body temperature (BBT) with a chart that confirms ovulation | Free | Free |
| Weight | Free | Free |
| Chance of conception for pregnancy planning, from your LH tests and BBT | Plus | Premium |
| Private intimate calendar | Plus | Premium |
| Learn library | Plus, guides for each of the 10 modes on phases, hormones and training | Premium (Insights, a few articles) |
| AI you can talk to | Plus (Phoebe, training and recovery) | Premium (Health Assistant, health questions) |
| Daily check-in on energy, sleep and mood | Free | Mood logging. Sleep and energy mentioned for perimenopause |
| Ovulation (LH) tests | Free | No |
| Hormone diagram for your phase and mode | Plus | Not mentioned |
| Cycle report for your doctor | Free, PDF | Premium |
| Modes for the pill, patch, ring, hormonal or copper IUD, implant or shot | Yes, each with its own phases | Birth control reminders |
| PMOS (PCOS), perimenopause, menopause | Own modes, free in the tracker | Perimenopause mode in Premium |
| Pregnancy | Pregnancy mode. Trimesters and symptom tracking free. Baby growth and pregnancy guides in Plus | Pregnancy mode in Premium |
| Community chats | No | Free (Secret Chats) |
| Partner mode | Coming soon | Premium (Flo for Partners) |
Flo details come from the Flo iOS app (checked 24 October 2026), flo.health/premium, its App Store listing and Healthline’s review. “Not mentioned” means we could not find it in those sources, not that it can’t exist.
A tracker that also trains you
Flo tells you where you are in your cycle. Phasly takes the next step and turns that into today’s workout. Your phase sets the starting plan, a 30-second check-in on energy, sleep, mood and symptoms adjusts it, and Phoebe builds the session or tweaks your own plan. You log the weights you lift, and next time the app shows what you did.
Every stage gets a training plan
Flo covers many life stages for tracking. Phasly plans training for each of them: around the active and break days of the pill, patch or ring, with a hormonal or copper IUD, on the implant or shot, with PMOS, through perimenopause and menopause with strength and bone work, week by week in pregnancy, and step by step after birth.
Honest about the science
Research does not show that a phase-by-phase plan builds more muscle, and group averages hide big differences between women. What is well documented is that many women feel the change across the month. So Phasly treats the cycle as a heads-up and lets how you feel decide the day. More in Does cycle syncing actually work?
Which one should you choose?
Choose Flo if you want a broad health tracker with community chats and a partner app, you are happy to pay for Premium to get pregnancy and perimenopause tools, and you don’t need help with training.
Choose Phasly if you train and want your workouts to follow your cycle and how you feel, with an AI coach, your own exercises, your weights and a Learn library about your cycle in one place. Some women use both.
Common questions
Is Phasly a Flo alternative?
For tracking your cycle, yes, and the Phasly cycle tracker is free. For training, Phasly does something Flo doesn't, it plans and logs your workouts around your cycle and how you feel.
Does Flo have workouts?
As of 24 October 2026 Flo's App Store listing does not mention workout plans or workout logging. It focuses on cycle, fertility, pregnancy and perimenopause tracking.
Do Flo and Phasly both have a free cycle tracker?
Yes. Both track your period, predict ovulation and keep your cycle history for free. The detailed side-by-side is in the tracker table on this page.
References
- Flo Cycle & Period Tracker. App Store listing. Checked 24 October 2026. App Store
- AYWA. Is Flo free? What you get without paying (2026). Prices observed on the US App Store on 15 October 2026. AYWA makes a competing tracker. AYWA
- Flo. Flo Premium vs free, official page. Checked 24 October 2026. flo.health
- Healthline. Flo Period Tracker review. Healthline
- The Next Web. Flo Health perimenopause tools. 2026. The Next Web
- McNulty KL et al. The Effects of Menstrual Cycle Phase on Exercise Performance in Eumenorrheic Women: A Systematic Review and Meta-Analysis. Sports Med. 2020, 50:1813-1827. Springer
