Most fasting and nutrition advice you see online is based on one big blind spot: it comes from studies on men.
Researchers have long used male participants because they’re considered “simpler” – no hormonal cycles to complicate data. The result? The majority of fasting, fitness and diet recommendations are optimized for the male body.
Our physiology changes week to week. Hormones influence how we burn fat, build muscle, process food and even how we sleep.
What works for men doesn’t simply scale down for women.
During perimenopause and menopause, these changes become even more dramatic. No wonder so many women feel frustrated when standard fasting or workout plans don’t deliver results – they weren’t designed for us in the first place.
The good news? A new generation of femtech apps is finally catching up. These apps help women sync their fasting, nutrition, fitness and even supplements with their hormonal rhythms.
Here are three you’ll find in the U.S. App Store:
1. FemFast
The newest player – and perhaps the most ambitious.
FemFast is an AI-driven app that adapts fasting, nutrition, workouts, and even supplementation to your exact hormonal state. Unlike traditional trackers, it doesn’t just tell you when your period is due – it uses your data to make personalized recommendations that shift with your cycle or hormonal stage.
Whether you’re in your follicular phase, managing PMS or navigating perimenopause, FemFast helps you make choices that actually fit your physiology.
2. Fitter Woman
Designed with active women in mind, Fitter Woman aligns training and recovery with the menstrual cycle. Inspired by sports science research, it helps women avoid fatigue and injury by syncing workouts with hormonal changes.
3. Balance
Created for women navigating perimenopause and menopause, Balance focuses on managing symptoms like hot flashes, mood swings and sleep disruption. It combines symptom tracking with practical lifestyle tips, helping women feel more in control during hormonal transitions.
The Future of Women’s Health
For too long, women have been expected to follow plans built on men’s bodies. That era is ending.
With apps like FemFast, Fitter Woman and Balance women now have tools designed for our hormones, our rhythms, our health. And when advice finally matches physiology, the results speak for themselves.