Investors
Backing better care for women's health.
Sister Health Ltd is raising its pre-seed round. SEIS and EIS advance assurance has been applied for.
The company
Sister Health is a women's health app for endometriosis, adenomyosis, PMOS (PCOS), PMDD and the cycles that don't follow the rules. It combines a daily symptom check-in, pattern detection that users confirm, an exportable Doctor's Report, a resource library, with an in-app community (Sister Club) coming soon. It launched on iOS and Android in September 2026. Sister Health is operated by Sister Health Ltd, registered in England and Wales (company number 17232888).
The problem
Around 190 million people live with endometriosis worldwide (World Health Organization), and in the UK it takes an average of 9 years and 4 months to be diagnosed (Endometriosis UK, March 2026). Women are routinely dismissed, misdiagnosed, and left to make sense of complex, cyclical conditions with tools that were never built for them. Sister Health exists to change that.
The founders
- Isabella Garland, CMO & co-founder — lives with endometriosis, adenomyosis and PMOS.
- Jade Symons, COO & co-founder — diagnosed with endometriosis.
- Luc Garland, CEO & co-founder — leads strategy and product.
- Jonathan McMaster, CCO & co-founder — leads commercial and partnerships.
Get in touch
If you'd like to learn more, email Luc at info@sisterhealth.app.
Investment documents are shared only after investor self-certification.