28X is the world’s first completely free, privacy-guaranteed women’s health platform, designed to make essential health education and cycle tracking accessible to every woman, everywhere. Built on trust, not trade-offs, 28X empowers millions of users across 100+ countries without ever compromising their privacy or charging a fee.
Founded by Amber Vodegel, creator of Pregnancy+, the world’s most downloaded pregnancy app with over 150 million users, 28X combines cutting-edge on-device AI with culturally sensitive, inclusive design available in 33+ languages and three reading levels.
Clinically validated and developed in collaboration with leading global health organisations, including the NHS, Wellbeing of Women, WHO, CDC, RCOG, and UNICEF, 28X delivers trusted, stigma-free resources for women and girls aged 12–55 worldwide.
The platform's groundbreaking privacy architecture processes all data on-device rather than in the cloud
Unlike traditional apps that monetise data, 28X processes all information securely on-device, never in the cloud. This groundbreaking privacy architecture ensures complete user control while delivering personalised insights through the app’s signature Butterfly Digital Twin, a beautiful visualisation of each woman’s unique cycle.
28X operates on a mission-driven reinvestment model, directing profits back into advancing women’s health research and education, setting it apart from commercial competitors that monetise user data. Its groundbreaking privacy architecture processes all information securely on-device, ensuring complete user control while delivering personalised insights through its signature Butterfly Digital Twin visualisation.
With more than 75 ambassadors, including healthcare leaders, educators, and advocates, 28X has built a comprehensive educational ecosystem featuring over 100+ articles and 20+ digital courses to combat stigma and promote accurate, accessible health information. The platform also supports menstrual stem cell research and partners with organisations addressing period poverty, including Hello Girls and Wellbeing of Women.
Committed to sustainability, 28X’s on-device processing model is projected to avoid 50,000 tonnes of CO₂ by 2027, proving that smarter technology can also be kinder to the planet.
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28X is redefining digital women’s health.
It’s the only platform that combines fully private, on-device AI with multilingual, culturally sensitive, and beautifully intuitive design, all powered by a mission-driven reinvestment model.
Our goal: to deliver free to use, privacy-first, and stigma-free health education to women and girls everywhere.
Founded: 2023 by Amber Vodegel, creator of Pregnancy+ (150M+ users)
Mission: Making women's health education accessible, private, and free for every woman, everywhere
Headquarters: London, UK (Registered: 15339330)
Users: Soon to be available in 33+ languages, 3 reading levels
Coverage: 100+ countries via app stores
Private: 100% on-device processing. No cloud storage. No Data sharing. No data monetisation.
Free: No subscriptions. No paywalls. No hidden costs. Free forever for every woman, everywhere.
Accessible: Soon available in over 33 languages. Designed for users aged 12 to 55, and optimised for neurodivergent users.
Sustainable: Net Zero commitment, 50K tonnes CO₂ avoided by 2027
Clinically Validated Content: All health information is aligned with trusted medical bodies including the NHS, WHO, CDC, RCOG, and UNICEF.
Educational content: 100+ articles and 20+ digital courses written and reviewed by healthcare professionals.
Global reach: Soon to be available in 100+ countries
Ambassador network: 75+ healthcare leaders and educators
Research contribution: Optional menstrual stem cell donation program advancing women’s health research.
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