8.9 days
estimated productivity loss
per year from reduced performance while present, derived from self-reported symptoms and reductions in productivity.
Together for
better cycle health
BodySeasons is the digital health journal for self-directed cycle tracking and professional support. We are looking for visionary partners, from coaches to health insurers, to make cycle health a lasting part of everyday life, the workplace, and medicine. Transparent, secure, and evidence-based. One principle always applies: Users decide which data they record and who they share it with. Employers, health insurers, and other organizations never receive individual health or tracking data.
As of 2026-07-24
The greatest opportunity lies between days of absence
Hormonal symptoms rarely lead directly to sick leave, but they can consume enormous amounts of energy. The result at work is presenteeism: Employees are present but cannot reach their full potential because of pain or exhaustion. This is where smart health support begins, long before a day of absence.
80.7%
reported presenteeism
in the Dutch survey of 32,748 women aged 15 to 45.
67.7%
wanted more flexibility
in tasks or working hours during menstruation. This is an expressed preference, not a measured productivity effect.
These figures come from an internet-based cross-sectional survey using self-reports. They describe the starting point, not the specific effect of a BodySeasons pilot. Original study in BMJ Open · Workplace context from the CIPD
Why our approach makes a difference
Individual rather than prescriptive
BodySeasons does not prescribe who should do which task and when. Instead, the app helps users recognize their own physical patterns and plan their working day proactively with those patterns in mind.
Health literacy, not surveillance
The goal is informed self-management, not surveillance. Individual cycle and symptom data remains under the user's control. It is not provided to employers or health insurers as performance or health data.
BodySeasons as part of your workplace health or prevention program
BodySeasons can be included as a voluntary offer in a workplace health or prevention program. Together, we define the scope, support, and a privacy-conscious evaluation. Personal health data remains with users.
Discuss a workplace-health or prevention pilotFour ways to work together
Every partnership begins with an open conversation. Our common ground is genuine value for users with complete data sovereignty.
Employers & workplace health
Support the wellbeing of your teams. Start a pilot project with us to build greater cycle awareness at work. Participation is 100% voluntary for employees, and our strict architecture guarantees that employers never receive personal health data.
Request a pilotCoaches & support
Support your clients even more effectively. Test with us how cycle tracking and professional guidance can be connected safely in everyday practice, from simple data sharing to quick withdrawal. We especially welcome feedback from real-world use.
Share feedbackHealth insurers
Modern prevention that reaches everyday life. Develop pilot projects with us to strengthen your members' health literacy. We guarantee the highest standards: Personal tracking data remains strictly separate from institutional evaluation.
Discuss cooperationResearch & science
Support BodySeasons scientifically. Let us discuss research questions, review methods, and develop ethically sound study formats together to advance knowledge about cycle health.
Discuss cooperationWhat BodySeasons already delivers today
As of 2026-07-24
Product facts
Start without email
An anonymous backup profile enables a start without an email address; a recovery code opens the profile again.
13 cycle profiles
BodySeasons covers natural cycles, hormonal contraception and different life stages through 13 selectable profiles.
Configurable tracking
Tracking areas can be enabled or hidden individually. Users decide which observations appear on their day view.
Granular coach sharing
Categories, free-text notes and the time period are selected separately. On withdrawal, the coach immediately loses access and the sharing data is removed from active storage.
Reports
Personal cycle and monthly reports summarise a selected completed period and can be saved as a PDF.
Security facts
Self-managed hosting
The website and core services run on self-managed servers. BodySeasons uses no advertising or tracking SDKs.
Encryption
Data is transferred over HTTPS/TLS. Cloud-save copies, stored AI reports, and shared coach data are encrypted server-side at rest with AES-256-GCM.
Data minimisation
Location data is only needed for the optional weather feature. Coach data is limited to granted permissions on both client and server.
GDPR-compliant processing
Requested AI reports also use purpose limitation, data minimisation, separate consent, documented data flows, and encrypted storage. Individual health data is not provided to cooperation partners.
Project assertion: the world's largest scientific cycle knowledge base
BodySeasons uses this phrase for a curated research knowledge base for cycle context and everyday guidance; not a database of user records and not a count of unique study participants.
Documented scope as of 2026-07-14: 298 evaluated specialist sources, including 96 studies and meta-analyses with documented samples totaling 171,500 participants, 13 cycle profiles, and 5 age groups.
This scope is an internal project status, not proof of medical efficacy. Sources are weighted and translated into cautious guidance; BodySeasons does not diagnose and does not replace medical advice.
Methodology and named sources on the science pageResearch-based body guidance and reports are clearly separated from horoscope and moon content. Horoscope and moon phases are optional and are not part of the scientific evidence base.
Current product status
The web version is available. The iOS and Android store versions are in preparation; purchases in the stores only become active after each store version is released and enabled.
Request a pilot