A longevity app built for women, not adapted from male data
Most longevity tools were modelled on male physiology and then resized for women. Tulsy starts from female biology: hormonal cycles, perimenopause, sleep debt, stress load and recovery, and turns your daily signals into a Longevity Reserve score you can actually act on.
Why women need a different longevity model
Clinical reference ranges, drug trials and most wearable algorithms were built predominantly on male participants. That is not a marketing claim, it is a well documented gap in health research. The result is that women receive recommendations calibrated for a body that behaves differently across a month, across pregnancy, and across the menopause transition.
Energy, sleep quality, resilience to stress and recovery capacity all move with hormonal phase. A longevity model that ignores that phase treats normal variation as noise, or worse, as failure to comply.
What Tulsy actually measures
Tulsy is a manual logging app by design. You record what you notice, and Tulsy finds the pattern. No wearable is required, and nothing is inferred from a device you do not own.
- Energy Forecast: what your next day is likely to feel like, and the drivers behind it
- Longevity Reserve: a running view of how much capacity you are building versus spending
- Cycle and phase context, so a low day is read against where you are in your month
- Sleep, stress, movement, nutrition and mood, logged in seconds rather than minutes
- Biomarker context across seven categories when you have recent bloodwork to add
Longevity is a daily balance, not a single score
Long term health outcomes are shaped by accumulated habits: sleep consistency, muscle mass, metabolic health, stress recovery and social connection. None of those change in a week. What does change in a week is whether you can see the trade you are making.
Tulsy shows the trade. When a run of short nights starts eating into your reserve, you see it before the crash rather than after it.
Who it suits
Tulsy is built for women who are already performing at a high level and want the reason behind their energy, not another streak to maintain. It is particularly useful through perimenopause, high load work periods, and returns to training.
Keep reading
Tulsy is free to download and free to use, with Premium for deeper intelligence. We are early and we read every message, so tell us what is missing at info@tulsyai.com.
Download Tulsy AITulsy is a wellness and self tracking tool. It does not diagnose or treat any medical condition.