Glow is a digital women’s health platform that pairs mobile apps, connected health devices, and an online community. Its apps and connected ecosystem may help you track menstrual cycles, fertile windows, ovulation, pregnancy progress, and everyday reproductive health metrics.
The brand also offers fertility-related trackers, premium app features, and educational content that may support informed tracking.
In this review, we discuss the brand’s app ecosystem, health tracking features, subscription options, and usability. The review also examines the advantages and potential limitations associated with the brand.
About Glow
Launched in 2013, Glow is co-founded by Max Levchin to help you better understand different stages of reproductive health through personalized tracking and data-driven insights.
The brand combines digital health apps with connected health products to create a single ecosystem. Its app lineup includes Glow, Nurture, Baby, and Eve Period Tracker, while its product range features the Wearable Breast Pump, the Basal Body Thermometer, ovulation test strips, pregnancy test strips, and fertility testing bundles that work alongside the apps.
A single Premium membership unlocks additional features across all four apps, including AI-powered guidance, advanced analytics, health forecasts, premium educational content, and personalized planning tools.
According to the official website, health information is protected through encrypted storage and secure data transmission. The offline data protection feature keeps key health records stored only on your device, with no storage on the company’s servers.
Core Offerings
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Smart Basal Body Thermometer
The Smart Basal Body Thermometer measures your basal body temperature (BBT) with precision and automatically syncs readings to the dedicated app. According to its official website, the thermometer measures temperatures to 0.01°C (1/100th of a degree), stores up to 30 readings on the device, and displays results on a backlit LCD screen with switchable Fahrenheit and Celsius units.
It works by detecting the body’s resting temperature immediately after waking, before physical activity or eating. As progesterone, released after ovulation, naturally raises basal body temperature, the device identifies these subtle shifts using a highly sensitive temperature sensor capable of measuring to two decimal places. Bluetooth connectivity automatically transfers readings to the app, where temperature trends are charted over multiple menstrual cycles to help identify ovulation patterns and estimate the fertile window.
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Fertility Bundle
Fertility Bundle pairs multiple fertility tracking tools to support ovulation monitoring, pregnancy testing, and cycle analysis. According to the official site, the bundle includes 50 ovulation test strips, 20 pregnancy test strips, one Bluetooth-enabled Smart Basal Body Thermometer, and a one-year premium subscription.
The ovulation test strips measure luteinizing hormone (LH) levels in urine to help identify the hormonal surge that typically occurs 24 to 36 hours before ovulation. Meanwhile, the pregnancy test strips detect human chorionic gonadotropin (hCG), a hormone produced after implantation that is generally detectable from around the day after a missed period. Both strip tests are scanned through the app, which records results, creates color-coded charts, tracks hormone trends, and combines them with cycle information for easier interpretation.
A premium subscription expands the tracking experience with advanced cycle and hormone charting, personalized fertility insights, long-term trend analysis, ovulation and period forecasting, and comparative data generated from a large user database.
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Smart Breast Pump
The Smart Breast Pump supports hands-free milk expression at home, at work, or on the go. As per its official site, it offers a suction of up to 300 mmHg, 12 adjustable suction levels, four pumping modes, and a 6-ounce (180 ml) milk collection capacity per side. Compatible with the Glow Baby app, it also offers automatic session tracking, customizable settings, multiple flange sizes (15 to 24 mm), and a rechargeable battery that provides approximately 150 minutes of operation on a full charge.
The pump works by creating controlled negative pressure around the nipple to stimulate milk ejection and maintain milk flow. Its four operating modes include stimulation, which mimics a baby’s initial rapid sucking pattern to encourage the milk let-down reflex. The expression mode applies slower and stronger suction to efficiently express milk after let down, while the massage mode provides gentler rhythmic suction intended to improve comfort before or during pumping.
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Digital & AI-Powered Services
Glow’s core digital services revolve around four connected mobile apps that support tracking of different stages of reproductive health. The Ovulation & Fertility Tracker app helps track menstrual cycles, fertile windows, basal body temperature (BBT), and ovulation test results, while generating personalized fertility predictions. Eve focuses on period and sexual wellness tracking, while the Nurture app follows pregnancy progress with week-by-week updates, due date tracking, symptom logs, and reminders. The Baby app helps record data on breastfeeding, pumping, bottle-feeding, sleep, diaper changes, medications, and growth.
Several AI-powered features are also integrated to personalize the tracking experience. GlowGPT provides around-the-clock conversational guidance for fertility, reproductive health, pregnancy, postpartum recovery, breastfeeding, and baby care.
The brand also provides an AI-powered ovulation test strip scanner that interprets compatible test strips through a smartphone camera and automatically logs results within the app.
Glow Advantage
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Integrated Fertility Care Ecosystem
Glow supports more than cycle tracking by connecting you with fertility care through the Fertility Program. Alongside health logging and fertility insights, the platform provides access to participating fertility clinics and negotiated pricing for services like IVF, IUI, ICSI, egg freezing, and fertility medications.
The program also brings together digital records and fertility planning in a more coordinated way. Information collected through the app can continue serving as a reference during fertility consultations, helping establish continuity across different stages of the conception journey. Its care pathway may reduce the effort of locating fertility providers independently while also helping to minimize certain care expenses through program-specific pricing benefits.
Glow Limitations
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Past Privacy Infrastructure Gaps
Glow has previously faced regulatory scrutiny over its privacy and security practices under the California Confidentiality of Medical Information Act (CMIA). According to the 2020 California Attorney General stipulation, the issues included unauthorized account linking through the Partner Connect feature, weaknesses in the password reset process, and security vulnerabilities involving sensitive reproductive health information. These documented privacy and security issues can reduce your confidence in storing sensitive reproductive health information on the platform.
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Opaque Prediction Validation
Glow states that it applies machine learning and algorithm-based analysis to transform the information entered across its apps into personalized fertility insights. While the platform highlights its technology-driven approach, it does not clearly explain how those predictive claims are independently validated.
The official website does not display accuracy studies, published performance metrics for ovulation or cycle forecasting, or detailed explanations covering model inputs, expected error ranges, or performance across groups such as irregular cycles, PCOS, postpartum stages, and perimenopause. Such a level of limited transparency may leave you looking for stronger supporting evidence before placing significant confidence in fertility forecasts connected to important planning decisions.
Pros
- Offers personalized health tracking across fertility, pregnancy, parenting, and ovulation.
- Educational resources support informed reproductive and menstrual health tracking.
- Health reminders promote consistent logging of reproductive health information.
Cons
- Manual logging demands regular participation for meaningful long-term insights.
- Some users noted inaccurate app insights and an unresponsive app interface.
Glow Alternatives
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Ovia Health
When comparing the brands, Ovia Health and Glow both operate in the digital women’s health diagnostic space, but they differ noticeably in their overall scope, platform model, and long-term focus. Founded as Ovuline and now part of Labcorp, Ovia Health has evolved into a digital health platform that supports general users as well as employers, health plans, and healthcare organizations across multiple stages of women’s and reproductive health tracking. Meanwhile, Glow follows a more direct app-based model that primarily focuses on fertility, menstrual health, pregnancy, and parenting through mobile applications and subscription features.
The breadth of services catalog further distinguishes the brands. Ovia Health provides a wide range of digital programs that extend beyond fertility to include pregnancy and menopause tracking, emotional health, personalized coaching, and care team support. A few signature apps from the brand include Ovia Fertility, Ovia Pregnancy, Ovia Parenting, and Ovia Menopause, alongside services such as Ovia+, personalized care plans, and video learning resources.
Meanwhile, Glow maintains a more focused portfolio built around reproductive health tracking through apps such as the Ovulation Tracker, Pregnancy Tracker, Baby Tracker, and Eve Period Tracker. Its premium membership expands these app ecosystems to integrate predictive analytics, comparative cycle insights, forecasting tools, private messaging, and educational content.
Ovia Health emphasizes clinically informed personalization supported by longitudinal health data, personalized care pathways, symptom tracking, mood tracking, critical alerts, continuous Care Team access, Apple Health and Google Fit integration, and healthcare reporting capabilities that include support for HEDIS quality measures. The brand also highlights collaboration with academic institutions and references more than 60 published research projects supporting its platform. Meanwhile, Glow focuses primarily on predictive reproductive health technology through cycle algorithms, ovulation prediction, fertility sign monitoring, basal body temperature tracking, cervical mucus tracking, menstrual analytics, forecasting features, and comparative cycle analysis.
Ovia positions itself as a clinically informed digital health platform covering multiple stages of women’s health diagnostics with extensive healthcare integration. Meanwhile, Glow maintains a more focused approach built around reproductive health tracking, predictive analytics, and app-based community engagement.
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Flo
Flo and Glow both offer app-based trackers to estimate different stages of women’s reproductive and menstrual health. However, the platforms differ in their structure, ecosystem expansion, data privacy standards, and accessibility.
The scope of products and services also distinguishes the brands. Flo primarily delivers its offerings through one integrated platform that includes menstrual tracking, ovulation prediction, fertility tracking, pregnancy tracking, symptom logging, health insights, AI-powered guidance, and menopause support. The platform remains largely software-focused and does not offer any connected devices or diagnostic products through its official website. Glow offers its services through specialized apps, including Nurture, Baby, and Eve Period Tracker, as well as access to GlowGPT and Glow Premium. Beyond its mobile applications, the brand expands into connected products, including the Smart Breast Pump, Smart Basal Body Thermometer, Fertility Bundle, Ovulation Test Strips, and Pregnancy Test Strips.
Flo reflects a unified software-focused philosophy supported by strict privacy standards and internationally recognized security certifications. Glow highlights a broad ecosystem that gives you specialized applications, connected products, and family-oriented digital experiences within a single platform.
How Did We Evaluate?
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Brand Reputation
We evaluated Glow’s brand reputation by examining its operational history, market presence, regulatory record, and ratings across independent review forums.
The brand has maintained a longstanding presence in the digital reproductive health space. However, its reputation is shaped by a prior privacy-related incident that showed it violated state medical privacy laws by allowing personal data to be shared without explicit user consent.
We also reviewed the brand’s visibility across independent review platforms. The brand currently has no visible presence on Better Business Bureau, Trustpilot, or ConsumerAffairs.
Our evaluation indicates that the brand has a mixed reputation, shaped by factors such as its established presence and the limited independent reputation data available. A previous history of regulatory concerns also makes it worthwhile to review the brand’s current privacy practices before sharing personal information.
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Real User Feedback
To evaluate Glow, we reviewed the brand’s app ratings, available user feedback, and overall experiences shared across the Google Play Store and Apple App Store.
At the time of writing, on Google Play, the Baby Tracker App has a 4.4 out of 5 rating from 14,000+ reviews, while the Pregnancy Tracker App holds a 4.0 out of 5 rating based on over 29,000 reviews.
The Eve Period Tracker has a 4.7 out of 5 rating from more than 114,000 reviews on the Apple App Store, while the Nurture App carries a 4.8 out of 5 rating based on over 30,000 reviews.
The feedback points to consistent appreciation for tracking capabilities, including pregnancy progress, baby care routines, menstrual cycle tracking, sleep, caregiver sharing, and educational content. However, some users of these apps expressed concerns about frequent advertisements, repeated upgrade prompts, and features becoming available only through paid subscriptions.
We also found repeated reports of performance issues, delayed synchronization between caregivers, login and account recovery problems, occasional data loss, and limitations with certain tracking features. Community discussions received mixed reactions, with some describing them as helpful while others questioned the quality of conversations or moderation.
Your experience is likely to depend on more than just the tracking features. The apps receive consistent appreciation for everyday health tracking, while paid feature limitations and occasional technical issues appear repeatedly across user feedback.
Conclusion
Glow brings together cycle tracking, fertility planning, pregnancy, parenting, and connected health tools within a single ecosystem. The brand organizes reproductive health over time, but prediction accuracy still depends on consistent data entry, and many advanced features remain part of the premium membership.
Unexpected cycle changes, fertility predictions that don’t match what you’re experiencing, or symptoms that feel unusual should never be explained away by an app alone. It works best as a tracking companion, while medical decisions, persistent symptoms, and pregnancy-related concerns still deserve follow-up with a doctor.
- About the Author
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Alisha Matthew has been a practicing nutritionist since 2016. She holds a master’s degree in nutrition from the University of IOWA. She is a staunch believer in improving the human health index by educating people about nutrition and the importance of nutrition in leading a healthy and happy life. Her long-term goal is to keep educating people on general health and keep herself updated with the latest trends in the field of health.