iPhone · cycle-phase planner
Plan by Phase schedules workouts, deep work, social plans and skincare around the four phases of your cycle, and reminds you two days before your planned luteal phase.
$12.99 a month, cancel anytime. Cycle dates never leave your iPhone.
Your week, translated
Enter your last period start and cycle length. The app places you in a phase today and forecasts the next seven days. No symptom logging required.
Do Progressive strength or a new class.
Skip Skipping the warm-up because you feel ready.
Do Start the new project while planning energy is high.
Skip Saying yes to every new thread.
Do Say yes to the things you’ve been curious about.
Skip Over-exfoliating because skin looks calm.
Do Bring back vitamin C or your glow step, slowly.
Skip Ghosting your own calendar.
Do Put collaboration, pitches and meetings here.
Skip Max effort with zero recovery around it.
Do Host, connect, take the social lead if you want to.
Skip Sunscreen-free outdoor days.
Do Use the high-energy window for a harder session if you want it.
Skip People-pleasing yourself into an empty tank.
What it plans
Push in your building phase; repeatable, moderate work in your wind-down phase. Never a personal-best attempt on a day your body is asking for less.
Launch and pitch in the outward stretch. Close loops and do the quiet deep work when the week turns inward.
Host when you have the tank for it. Protect evenings when you don’t. One good plan beats four thin ones.
Barrier repair when skin is reactive, actives when it’s calm. A routine that changes with the month instead of fighting it.
How it works
Last period start and average cycle length. That’s it. Both stay encrypted on your iPhone.
The app places you on the ring today and shows which phase your week falls in. Then it forecasts the next seven days.
One do and one skip per day for the categories you chose. Push the week to your calendar with a tap. Get a reminder two days before your planned luteal phase.
Pierson et al. (2021) analysed app data and reported group-level mood and energy patterns across the menstrual cycle.Pierson et al., Nature Human Behaviour, 2021 · doi:10.1038/s41562-020-01046-9. Group tendencies, not a diagnosis. Plan by Phase is a planner, not medical advice.
Pricing
Prices shown in US dollars; your App Store price is shown before you confirm.
Renews every week until cancelled.
Renews every month until cancelled.
Renews every year until cancelled.
Payment is charged to your Apple ID at confirmation. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, in Settings → Apple ID → Subscriptions. Restore purchases from the paywall or Settings if you switch iPhones.
Questions
No. Plan by Phase is a lifestyle planner. Phase labels and do / skip lines are planning suggestions built on group research about how energy, mood and sleep tend to shift across the cycle. It does not diagnose, treat or predict anything about your health. Talk to a licensed clinician about periods, fertility or symptoms.
It stays on your iPhone, encrypted, with the key in the iOS Keychain. Your dates and name are never sent to us, to analytics, or to advertisers. Delete everything from Settings → Delete all my data.
Read the privacy policy for the full list of what the app does send (purchase receipts to Apple, anonymous funnel events).
Maybe not. Many hormonal contraceptives suppress the natural phase pattern. The app tells you this during setup and you can still use it as a loose weekly rhythm, but treat the phase labels as a guide, not a fact about your body.
Trackers log symptoms and predict your next period. Plan by Phase takes two inputs and gives you a plan: which days to push, which to protect, what to do and skip in each category you picked, a calendar export and a phase-change reminder. It never asks you to log a symptom.
Settings → your Apple ID → Subscriptions → Plan by Phase → Cancel. Cancel at least 24 hours before your renewal date to avoid the next charge. Apple handles all billing; we cannot see or change your payment details.
Not yet. iPhone only, iOS 17 or later.