Daysy
Daysy is a medical technology company selling FDA-cleared hormone-free fertility tracking devices (Daysy, Lady-Comp, Teena) to women seeking natural family planning. Its products use basal body temperature sensing and proprietary algorithms backed by 40 years of research on over 10 million menstrual cycles.
- Company typePrivate
- Founded1986
- HeadquartersCollegeville, United States
- Headcount11–50
- GTM typeB2C
- OfferingHardware or Manufacturing
What Daysy does
Daysy is a medical technology company that develops and sells hormone-free fertility tracking devices to women seeking natural family planning and reproductive health monitoring. Its core technology is a proprietary basal body temperature (BBT) sensing system that detects the 0.45-0.81°F temperature shift occurring approximately 24 hours after ovulation, feeding data into an algorithm trained on analysis of over 10 million menstrual cycles accumulated over 40 years of research. The company claims 99.4% accuracy in identifying the 6-day fertile window per cycle.
The product portfolio comprises three devices: Daysy (the flagship app-connected fertility tracker), Lady-Comp (an off-grid variant requiring no app or Bluetooth, storing data on-device), and Teena (a period tracking device designed for teenagers, paired with a free educational app). All devices operate as FDA-cleared, Health Canada-approved, and DQS/MED-certified medical devices, with HSA/FSA purchase eligibility in the US. A privacy-by-design architecture stores cycle data locally on-device rather than in the cloud, a positioning the company uses to differentiate from app-based competitors.
The business model is direct-to-consumer hardware sales through the company's e-commerce storefront (daysy.me), supplemented by a content-led acquisition funnel that includes a personalized device quiz, free educational e-books, expert cycle analysis services, and an active social media presence across Instagram, TikTok, Facebook, and YouTube. The company has accumulated 500,000+ users globally over its four-decade operating history. Pricing is not publicly disclosed on the website; potential customers are funneled through the recommendation quiz rather than direct price transparency. The company is privately held with 11-50 employees, headquartered in Collegeville, United States, with regulatory distribution reach across North America and a social/discovery footprint extending globally.
Daysy firmographics
Firmographics- Name
- Daysy
- Website
- https://daysy.me
- Company type
- Private
- Founded year
- 1986
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Daysy is a medical technology company selling FDA-cleared hormone-free fertility tracking devices (Daysy, Lady-Comp, Teena) to women seeking natural family planning. Its products use basal body temperature sensing and proprietary algorithms backed by 40 years of research on over 10 million menstrual cycles.
- Ownership category
- akta.pro rank
Daysy industry classification
Industry- Product category
- Fertility Tracking Devices
- akta.pro primary industry
- Women’s Health & Fertility Tracking Devices (Ovulation/Temp Sensors, Pelvic Health Devices) (CRACAQAJ)
- akta.pro secondary industry
- Fertility & Ovulation Products (OTC) (CRABAIAK)
Keywords
Where Daysy is headquartered
LocationHeadquarters
- HQ city
- Collegeville
- HQ country
- United States
- HQ region
- North America
Markets served
Daysy business model
Business model- GTM type
- B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Technology or R&D, Marketing or Sales, Operations, Personnel
Revenue model
- Fertility Tracking Devices: Daysy generates revenue primarily through the sale of hardware fertility tracking devices (Daysy, Lady-Comp, and Teena). These are one-time purchase medical devices that provide ongoing fertility tracking without requiring subscriptions or additional purchases.
Go-to-market motion2 records
Distribution channels2 records
Marketing channels6 records
Daysy product offering
Product offeringCore offering
Daysy designs, manufactures, and sells a line of FDA-cleared fertility tracking medical devices (Daysy, Lady-Comp, and Teena) that measure basal body temperature each morning and apply proprietary algorithms to identify fertile and non-fertile days. The devices are sold directly to individual women through the company's e-commerce storefront as a hormone-free, non-invasive alternative for natural family planning and cycle awareness, supported by complimentary cycle analysis and educational content.
Product overview
Daysy offers a portfolio of fertility tracking medical devices based on 40 years of scientific research and data analysis of over 10 million menstrual cycles. The product line consists of three distinct devices: Daysy (the flagship fertility tracker), Lady-Comp (an off-grid fertility monitor without app connectivity), and Teena (a teen-focused period tracker with a companion educational app). All devices operate by measuring basal body temperature to detect the subtle temperature rise (0.45-0.81°F) that occurs approximately 24 hours after ovulation, enabling women to identify their fertile window with 99.4% accuracy for natural family planning.
Differentiator
Problem solved
Functional benefit
Brands
- Lady-Comp: No need for an app or bluetooth. Fertility tracker that operates completely off the grid.
- Teena
Products and services
- Daysy Fertility Tracker Medical-grade fertility tracker that monitors basal body temperature each morning to identify fertile and non-fertile days with 99.4% accuracy, helping women track ovulation and plan or prevent pregnancy naturally without hormones. Designed for individual women seeking natural family planning and cycle awareness.
- Lady-Comp Fertility Monitor
Quantifiable outcome
- 99.4% accuracy in identifying fertile and non-fertile days
- +2 more outcomes
Companies that use Daysy
Customer profileNamed customers3 records
Segments2 records
Ideal customer profiles2 records
Daysy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Daysy partnerships and signals
Strategic signalScale indicators4 records
Recent moves5 records
Expansion highlights5 records
Daysy competitors and assessment
Company assessmentDirect peers
- Natural Cycles: FDA-cleared app-driven fertility tracking product that also relies on basal body temperature data to identify fertile windows. Most direct competitor to Daysy, differing primarily in software/cloud delivery model and subscription monetization versus Daysy's hardware-only model.
- Ava: Wearables-based fertility tracking bracelet that combines temperature, pulse, and other physiological sensors for cycle and conception predictions. Targets the same hormone-free, science-backed consumer as Daysy but via a multi-sensor wearable form factor.
- Tempdrop: Wearable BBT sensor worn overnight that captures continuous temperature data for fertility charting. Competes directly with Daysy on hormone-free cycle tracking, differentiated by arm-band form factor and lower price point.
- Clue: Leading period and cycle tracking app with strong consumer brand among women seeking reproductive-health insights. Competes with Daysy's DaysyApp and Teena educational app on cycle awareness, though without BBT hardware.
Broad incumbents
- Oura: Smart ring with cycle and temperature tracking features layered onto a broader sleep and recovery platform. Reaches Daysy's target consumer through a general-purpose wearable, applying significant marketing and R&D scale.
- Apple (Health / Cycle Tracking): Apple Watch and iPhone Health app include cycle and temperature tracking, leveraging massive distribution and ecosystem lock-in. Bundles fertility tracking into a general-purpose consumer health platform rather than specializing.
- Fitbit / Google: Fitbit devices and the Google Health platform provide cycle tracking integrated with broader activity and health features. Reaches the same female consumer base through a general-purpose wearable ecosystem under Google's scale.
- Flo Health: Mass-market period, ovulation, and pregnancy tracking app with a very large global user base. Targets the same woman tracking fertility cycles but through a software-only, freemium model.
Emerging players
- Mira: Hormone-monitoring fertility device measuring LH, estrogen, and progesterone metabolites at home. Adjacent competitor in the hormone-free, at-home fertility tracking space with a different biomarker approach than BBT.
- Kindbody: Tech-enabled fertility clinic network offering diagnostic and treatment services. Indirect competitor/partner serving women seeking fertility support, including those who begin with consumer tracking devices like Daysy before escalating to clinical care.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Daysy social profiles
Digital presenceDaysy compliance and trust
Trust signalCompliance5 records
Daysy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Daysy leadership team
Management profileNumber of profiles
Daysy funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Daysy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Daysy
What does Daysy do?
Daysy designs, manufactures, and sells a line of FDA-cleared fertility tracking medical devices (Daysy, Lady-Comp, and Teena) that measure basal body temperature each morning and apply proprietary algorithms to identify fertile and non-fertile days. The devices are sold directly to individual women through the company's e-commerce storefront as a hormone-free, non-invasive alternative for natural family planning and cycle awareness, supported by complimentary cycle analysis and educational content.
When was Daysy founded?
Daysy was founded in 1986. It employs 11 to 50 people.
Where is Daysy based?
Daysy is headquartered in Collegeville, United States, in the North America region.
How does Daysy make money?
One revenue line is on record: fertility Tracking Devices.
Who are Daysy's main competitors?
Direct peers on record are Natural Cycles, Ava, Tempdrop and Clue. Broad incumbents are Oura, Apple (Health / Cycle Tracking), Fitbit / Google and Flo Health. Emerging players are Mira and Kindbody.
Does Daysy have an API?
No public API is recorded for Daysy.
What industry is Daysy in?
Daysy's product category is Fertility Tracking Devices. Its primary akta.pro industry code is CRACAQAJ, Women’s Health & Fertility Tracking Devices (Ovulation/Temp Sensors, Pelvic Health Devices), with a secondary code of CRABAIAK, Fertility & Ovulation Products (OTC).