Your hormones cycle through three distinct phases every month. What works in one phase can actively backfire in another. PeriFlow tells you which phase you're in today and what your body may actually need — personalised to how you eat.
During perimenopause, your hormones don't just decline — they fluctuate in a repeating monthly pattern. Most wellness advice ignores this entirely. Eat 1,400 calories. Fast 16 hours. Do HIIT five times a week. But your body doesn't work on a flat schedule. The women who feel best during this transition aren't doing more — they're matching what they do to where they are in their cycle.
PeriFlow calculates your current phase from your cycle data and adapts everything — what you eat, how you fast, how you move — to match what your hormones may need today.
Your metabolism is naturally flexible. Many women find this is when fasting feels most comfortable — a 12–16 hour overnight window is worth exploring if your energy feels steady. Higher-intensity movement tends to feel good here. Your body is building oestrogen and responding well to protein-forward eating.
The brief peak. Your hormones are working hard and your body is using energy to manage the surge. This isn't the moment to push fasting further — a comfortable 12–14 hours is plenty. Many women notice sharper thinking and more energy. Eat well, move if you feel like it, and enjoy the clarity.
Progesterone needs glucose to function — your body genuinely requires more food right now. Research shows calorie needs increase by 100–200 kcal/day in this phase. Three nourishing meals with complex carbohydrates — sweet potato, lentils, oats — stabilise blood sugar and directly support the hormones managing your symptoms. Fasting here works against you.
Not a period tracker with a wellness coat of paint. A complete daily system that adapts to your cycle, your diet, and your body.
Hundreds of meals across 7 diet styles. Every suggestion includes "why this meal?" — connecting ingredients to your hormones today.
Your fasting window adjusts by phase. Built-in protection during Root ensures you never accidentally fast when your body needs fuel.
Energy, hot flashes, sleep, brain fog, anxiety, and 17 more — with sparklines, heatmaps, and patterns that become visible over time.
Designed for irregular cycles. Period prediction windows based on your range, not a single date. Variability insights informed by clinical staging.
Connects what you eat to how you feel. See which meals improve your energy and which days cluster with your worst symptoms.
Generate a formatted report with symptom trends, daily data, and meal logs — so your healthcare provider sees real data, not "I've been feeling off."
Phase tracking, cycle calendar, and symptom journal are always free. Unlock the full app — meals, fasting, exercises, insights, clinical export — with a 7-day trial then your choice of plan.
7-day free trial · Cancel anytime in your device's subscription settings
PeriFlow launches on iOS and Android in May 2026. Coming to the App Store and Google Play.