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Best Cycle Syncing Apps (2026): An Honest Comparison
Compare the top cycle syncing apps for workouts, food and hormone health: 28, MyFLO, Stardust, Harmony, Lively, Wild.AI and Flo. Who each one is best for.
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The short answer
If you want your workouts and meals planned around your cycle each day, 28 is built for that: daily phase-matched workout videos, phase-based nutrition with calorie and photo meal logging, and Gaia, an AI wellness companion, on top of period and ovulation tracking. If you mainly want accurate period predictions and symptom logs, Clue or Flo are stronger trackers. If you want the original Cycle Syncing® program, MyFLO is the reference.
Disclosure:28 wrote this page. We've linked every claim about another app to its source and said where another app is the better pick.
What “cycle syncing” means
Cycle syncing means adjusting how you train, eat and rest to the four phases of your menstrual cycle: menstrual, follicular, ovulatory and luteal. Research on performance by phase is still mixed, so the best apps adapt to how you actually feel rather than to a textbook 28-day cycle.
Quick comparison
| App | Best for | Workouts by phase | Food by phase | AI help | Free tier | iPhone rating (US) |
|---|---|---|---|---|---|---|
| 28 | Daily workouts and meals planned for your phase | Yes, video | Yes, plus calorie and photo logging | Gaia | Yes, with a paid plan | 4.6 from 5,680 ratings |
| MyFLO | The full Cycle Syncing® method | Monthly videos | Yes, recipes | None advertised (App Store, FLO Living) | Free download, then a paid Cycle Syncing® membership (App Store). What's free without it isn't stated (FLO Living). | 4.4 from 14,200+ ratings |
| Stardust | Hormone education, free tracking | No | No | AI in its insights; no AI chat advertised (App Store) | Yes (FAQ) | 4.8 from 119,900+ ratings |
| Harmony | Beginner-friendly daily guidance | Tips | Tips | AI coach | Basic tracking free; paid plans after a 7-day trial (FAQ, App Store) | 4.7 from 10,100+ ratings |
| Lively | Holistic tips and symptom tracking | Tips | Tips | AI Advisor (site) | Yes, with optional Premium (site, App Store) | 4.8 from 55,200+ ratings |
| Wild.AI | Runners and endurance athletes | Training load | Partial | Readiness score and training tips; no AI chat advertised (App Store) | Yes | 4.3 from 412 ratings |
| Flo | All-round period tracking | Generic insights | Generic insights | Health assistant | Yes, core cycle tools. Premium adds tailored insights, videos and a 24/7 Health Assistant (App Store) | 4.7 from 2M+ ratings |
Competitor cells were checked October 29, 2026 against each app's US App Store page and its own site. 28's US App Store rating was rechecked November 10, 2026: 4.6 from 5,680 ratings. Ratings come from Apple's public app lookup.
Which app is best for you
- You want someone to tell you today's workout and what to eat: 28.
- You want to follow a structured, branded method with recipes: MyFLO.
- You want free tracking with hormone explainers: Stardust.
- You're a runner who trains by heart rate and load: Wild.AI.
- You only want period and fertile-window predictions: Clue or Flo.
28 in detail
- Workouts: daily sessions for each phase, from trainers of iconic supermodels. Push harder at your peak and scale back when your body asks for rest.
- Nutrition: calorie targets that fit your goal and your phase, photo meal logging, recipes from a photo of your fridge, and one-tap phase groceries through Instacart or Uber Eats.
- Gaia: ask about your cycle, energy, cravings, workouts and food, by voice or text. Gaia gives general wellness information, not medical advice.
- Tracking: period calendar, fertile window and ovulation estimates, symptoms, PMS and mood, and Oura Ring or Apple Watch temperature to refine your fertile window.
- Partner sharing: your partner sees your phase and how to help.
- Honest limits: 28 is not birth control and not a medical device. Fertile window estimates should not be used to prevent pregnancy. Some features need a paid plan.
Privacy
There are no ads in 28, and we don't sell your data. We don't use your health data for advertising. You can delete your account and data in the app at any time. Full details are in our privacy policy.
Common questions
- What is the best cycle syncing app?
- It depends on what you want synced. For daily workouts and meals built around your phase, 28. For the original Cycle Syncing method, MyFLO. For period tracking only, Clue or Flo.
- Is there a free cycle syncing app?
- Several have free tiers, including 28, Stardust and Flo. Full workout and meal plans in 28 need a paid plan.
- Does cycle syncing work if my cycle is irregular?
- It works best when the app adapts to your logged cycle rather than assuming 28 days. 28 updates your phase from what you log, and can use Oura or Apple Watch temperature.
- Can a cycle syncing app be used as birth control?
- No. Only apps the FDA has authorized as contraception, such as Natural Cycles, should be used that way.