Menotracker wants to fix menopause symptom tracking — without selling user data
Menotracker, the AI-powered menopause-tracking app, has launched in partnership with the privacy technology company ConsentKeys consentkeys.com to become the first and only women’s health application that will never store users’ personal data.
The Menotracker app transforms perimenopause and menopause symptoms into personalised insights and support.
I spoke to the startup’s CEO, Sonja Rincón, to learn all about it.
“I’m a very angry perimenopausal woman”
The company’s origin is deeply personal. The whole idea of the company came about because, according to Rincón,”I’m a very angry perimenopausal woman. That’s honestly the truth.”
Rincón has a background in law but felt unfulfilled. In 2024, one of her friends started having hot flashes, and she remembered thinking, “Isn’t she too young for that? So, she started researching.
Before that, she’d never heard of perimenopause. Perimenopause is the transition from the fertile years of your 20s and 30s, when the ovaries produce high levels of the female hormones (Estrogen and Progesterone) during each cycle, to menopause, when ovulation and periods stop permanently.
Perimenopause lasts on average around five years, but this can greatly vary from woman to woman. The average age of the final period is between the age of 45 and 55 years. However, symptoms of perimenopause can start in the late 30s to early 40s.
The invisible load women carry
Perimenopause is accompanied by a wide range of physical, emotional, and cognitive changes. When Rincón began researching it, she discovered that the transition can include as many as 100 possible symptoms, from hot flushes to sleep disturbances, joint pain, brain fog, and weight fluctuations, meaning that alleviating symptoms requires a comprehensive, personalised approach.
Compounding the impact, it often occurs when women are at their peak earning years, while simultaneously managing the pressures of parenting and caring for ageing parents.
Rincón shared:
“Around the same time, that same friend didn’t get a promotion because her employer said she looked unprofessional and wasn’t taking care of herself. That really upset me.”
By then, she realised she’d been in perimenopause herself for years.
“I’d been given all kinds of treatments, but nobody connected the dots. It’s a very typical story.”
Reduce medical gaslighting with data
Menotrack allows users to track symptoms, connect wearables such as smartwatches, and generate reports showing correlations between lifestyle factors and symptoms.
“You have to be the CEO of your own health, asserts Rincón.
“One of my main goals is to reduce medical gaslighting. Advocacy is easier when you’re prepared. Most doctor visits are short. When you walk into a doctor’s office with structured data, it’s harder to dismiss you.”
Rincón loves data because it gives you an objective overview.
“I grew up with computers, I’ve always followed tech and AI, I build things with no-code tools — so I assumed something like this must exist. But I couldn’t find anything that truly worked the way I wanted.”
While there are many women’s health trackers, most are basic. Rincón explained that typically, “You can log things, but you can’t really use the data to understand your health. And often, the company benefits more from your data than you do. That didn’t sit right with me.”
The startup has a menopause expert advisory panel that helps design the reporting structure so it’s meaningful to both patients and clinicians.
Another major goal is diversity in research.
“Most menopause research represents white women. We already know medications can behave differently depending on skin colour or genetic background. We need better datasets to understand why symptom patterns vary.”
Privacy protection is critical
Menotracker is launching with what may be the most comprehensive privacy protection in femtech - and unlike other free online services, where people are the product,
Menotracker’s users are fully protected. Recent high-profile cases have exposed how intimately sensitive health information is routinely exploited: period tracking app Flo Health and its partners Google and Meta recently settled for $56 million after being found liable for sharing users’ menstrual and sexual health data without consent. More alarmingly, prosecutors in several US states have already used period tracking data, search histories, and text messages as evidence in abortion-related criminal cases.
Further, in the US, companies can legally collect, store and sell women’s health data to data brokers, who then make it available to advertisers, insurance companies, employers and law enforcement. Period tracking apps are not covered by HIPAA, and data brokers can sell location information about anyone who visits an abortion clinic to anyone with a credit card.
Menotracker’s privacy-first approach addresses systemic vulnerabilities head-on.
By partnering with ConsentKeys' proprietary privacy-first authentication system, users are assigned pseudonymous identities with unique credentials for the platform. Even in the event of a data breach, stolen information would contain only dummy data that cannot be traced to real individuals.
Crucially, Menotracker itself cannot access users' true identities, making it technically impossible to sell, share or be compelled to hand over personal health information to third parties.
"Women tracking intimate symptoms like incontinence, vaginal dryness, or mental health changes need absolute confidence that their data cannot be accessed by employers, insurance companies, or governments," said Rincón.
"This partnership means we've designed our system so that we literally cannot compromise user privacy – because we don't have access to real user information ourselves."
According to Kris Constable, Founder of ConsentKeys, the real user information is encrypted and distributed across multiple jurisdictions in a way that would require years of legal process for anyone – including governments – to even attempt to access.
“We've coined the phrase 'privacy is consent' because women deserve the opportunity to choose how their information is being used, something that's rarely offered in the tech world."
Developed in partnership with over 200 perimenopausal women and certified menopause specialists, Menotracker captures the full spectrum of menopause symptoms, from hot flushes and night sweats to under-discussed experiences such as word-finding difficulty or a burning mouth sensation.
Real verified information
The platform includes medically reviewed content, community support, visual symptom summaries, and doctor-ready reports, all while ensuring complete anonymity.
“There’s so much misinformation online,” asserts Rincón.
“Women in perimenopause are a target group for people selling miracle supplements. I want evidence-based information available in one place, free and accessible. Fitness, sleep, nutrition — these things matter enormously. I’ve been experimenting on myself.
Following a science-based fitness program improved my brain fog and sleep within months. Women deserve to know these options exist.”
Menotracker is building partnerships, mostly in the UK, Canada, and the US.
Rincón describes her home country of Austria as a desert of information about perimenopause and menopause:
“Awareness has improved slightly in the last two years, but it’s still minimal.”It’s been much harder in Austria and Germany. There’s not enough pressure yet. Women are still expected to suffer quietly.”
The economic case for menopause support
Further, untreated perimenopausal symptoms cost economies billions. Deloitte Canada estimated $3.5 billion annually. The UK estimates that around one billion workdays are lost. This isn’t just a health issue — it’s an economic one. Rincón asserts:
“Employers don’t act because of charity. They act because it affects productivity and retention. The UK is ahead because policy pressure forced the conversation. We’re working on partnerships with organisations that certify menopause-friendly workplaces. Awareness in the DACH region is still far behind.”
Privacy as principle: the investor divide in Femtech
When it comes to funding, Rincón says, finding investors isn’t the problem — it’s been more challenging to find investors who align with values.
According to Rincón, “Many asked, 'If you don’t sell data, how do you make money?” That question alone shows the mindset. We could have raised earlier, but I refuse to compromise on privacy. If competitors want to sell women’s data, they can. We won’t. I only want partners who understand that protecting women’s health data is non-negotiable.”
In the long term, Rincón wants women everywhere to have access to quality healthcare, regardless of where they live.
“English-speaking markets are our starting point because it’s financially realistic for a startup. But the long-term vision is global. I want transparent information, inclusive research, and technology that helps women understand their bodies without fear. That’s the mission.”
The app is available in 177 countries and 41 languages, providing free access to AI-powered symptom analysis and medical-grade educational content.
For Rincón, the goal is simple: technology that helps women understand their bodies without fear — and without being treated as data products.
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