Why PeriFlow exists
PeriFlow is a cycle-synced wellness companion for women in perimenopause. It tells you what phase of your cycle you're in — even when your cycles are irregular — and adapts what to eat, when to fast, and how to move accordingly.
Most health apps treat the body as if it runs on a flat schedule. Eat this many calories. Fast this many hours. Do this workout. But during perimenopause, your body cycles through three distinct hormonal phases each month, and the same advice that helps in one phase can actively backfire in another.
PeriFlow was built to close that gap.
What makes PeriFlow different
Phase-aware guidance. PeriFlow calculates your current cycle phase — Rise, Crest, or Root — from your period data and adapts every recommendation to match. Fasting that works in Rise. Nutrition that supports Root. Movement that fits where your body actually is today.
Built for irregular cycles. Perimenopause means cycles that stretch, shorten, skip, and surprise you. PeriFlow handles all of it — including anovulatory cycles, spotting, and gaps of 60+ days — without defaulting to a 28-day assumption.
Grounded in science. Every recommendation in PeriFlow is informed by peer-reviewed research in reproductive endocrinology, metabolic science, and sports medicine. We cite our sources, explain the mechanisms, and never make claims we can't support.
Seven diet styles. Omnivore, vegan, vegetarian (with a pescatarian option), Mediterranean, and paleo. Every meal suggestion respects your dietary choices — not just in name, but in actual nutritional composition.
Who PeriFlow is for
Women aged 40–55 navigating perimenopause. Women who have tried generic health apps, calorie counters, and fasting timers — and found that what used to work has stopped working. Women who want a system that works with their biology instead of ignoring it.
PeriFlow is not a medical device and does not provide medical advice. It is a wellness companion that helps you understand your cycle, make informed choices, and feel like yourself again.
The science behind the phases
PeriFlow's three-phase model — Rise (follicular), Crest (ovulatory), and Root (luteal) — maps the hormonal patterns that drive how your body responds to food, fasting, and movement across the menstrual cycle.
- Rise phase: Estrogen climbs, insulin sensitivity improves, and the body handles fasting and higher-intensity exercise well.
- Crest phase: Estrogen peaks around ovulation. Energy is high, but the window is short — typically 3–4 days.
- Root phase: Progesterone rises and competes with cortisol. Extended fasting becomes counterproductive. The body needs more fuel, more complex carbohydrates, and gentler movement.
This isn't a philosophy — it's how reproductive endocrinology works. Understanding it changes everything about how you eat, fast, and train during perimenopause. Read more in our guides to perimenopause and perimenopause symptoms.
Get in touch
Questions, feedback, or partnership enquiries: hello@periflow.io