OOVA vs Evie Ring
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OOVA
This app translates hormone levels using at-home urine tests to track, predict, and confirm ovulation. It offers personalized insights into your unique cycle, allowing you to customize data logging and share results with healthcare providers.
- Quantitative hormone measurement (LH, E3G, PdG)
- Personalized cycle tracking and fertile window prediction
- Customizable data logging (mood, symptoms, etc.)
- HIPAA-compliant data sharing with healthcare providers
- At-home urine test analysis via smartphone camera
- Medically trusted design in partnership with Mount Sinai
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Meet Oova: the hormone translator that quantitatively measures luteinizing hormone (LH), E3G (an estrogen metabolite), and PdG (a progesterone metabolite) through an at-home urine test. Oova’s Hormone Kit tracks, predicts, and confirms ovulation with precision whether you are trying to conceive, navigating perimenopause, or mapping your cycle. Lab accuracy in your home: Oova was designed in partnership with Mount Sinai Hospital in New York City to build a tool that doctors and patients can feel confident using. Scientists, engineers, and doctors designed Oova to be the most medically trusted at-home hormone test. Completely personalized experience: Oova measures your hormone levels quantitatively to provide valuable insights, rather than comparing your data to some standard threshold or the “perfect" 28-day cycle. Oova learns what your personal cycle trends are and detects your fertile window from there. Our algorithm tells you exactly which days to test, so not a cent, day, or pee, is wasted! Track as little or as much as you want: Customize data logging to track what’s most relevant to you. You can choose from a variety of categories including mood, exercise, cervical mucus, symptoms, and medications. All of this information (paired with your hormone levels) allows Oova to get smarter and learn your unique hormone baseline. Use Oova with your healthcare provider: Oova allows doctors and clinicians to provide unprecedented remote care. If you’re working with a doctor, your provider will be able to see your data in our HIPAA-compliant dashboard, as soon as you scan your Oova strip. You no longer have to worry about what your doctor wants or needs to know. Oova takes care of that for you. How it works: Register in the app and activate your Oova Hormone Kit. On a testing day, provide a urine sample on the test strip (either midstream or by dipping it into a cup), and scan the strip with the camera on your smartphone. Our algorithm will analyze your strip to calculate how much luteinizing hormone, PdG, and E3G is present. Within minutes, you’ll know exactly where you are in your cycle and be provided with resources to help guide your journey.
Evie Ring
This app offers a comprehensive approach to women's wellness, empowering users to track their menstrual cycle, analyze sleep quality, and monitor daily activity. It provides personalized insights to help users understand their bodies and take control of their health journey.
- Menstrual cycle tracking
- Sleep quality analysis
- Activity tracking
- Workout logging
- SpO2 monitoring
- Heart rate monitoring
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Say "hello" to a new dawn for women's wellness. Evie is on a mission to bring you a trusted and personalized whole wellness solution that gives you the power to take control of your unique journey. Menstrual Cycle Track your period and menstrual symptoms to better understand yourself. Sleep Quality Identify ways to get a more restful sleep with detailed analysis of your sleep cycles and overnight wellness vitals. Activity Tracking Get a comprehensive understanding of your activity levels throughout the day with workout logs and continuous activity tracking. ** Tested against and accurate to International Standard IEC 80601-2-61 for peripheral blood oxygen levels (SpO2) and heart rate during spot check. ** In addition to using the App, seek a doctor's advice before making any medical decisions.
Screenshots
Verdict
The clearest difference is rating: OOVA at 4.4 against Evie Ring's 1.5. OOVA also leads on review sentiment (47% vs 7%) and ratings volume (50 vs 16). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OOVA holds the better App Store score, 4.4 against 1.5. Both are backed by a comparable volume of ratings — 50 and 16 respectively. Written reviews point the same way: 47% of OOVA's written reviews are positive against 7% of Evie Ring's.
OOVA ships an update every 2 weeks, Evie Ring every 3 weeks. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.
| Parameter | OOVA | Evie Ring |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (50 ratings) — better | 1.5 (16 ratings) |
| Positive reviews | 47.1% of reviews — better | 6.6% of reviews |
| Number of ratings | 50 — better | 16 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 154 MB |
| Age rating | 17+ | 17+ |
| Developer | OOVA inc. | Movano Inc |
Customer experience
OOVA
Evie Ring
Bugs and requests
OOVA
Not enough reviews yet to summarise bugs or requests.
Evie Ring
Reported bugs
18 issues- Ring won't sync with app
- Battery dies within 3-6 months of use
- App crashes frequently
- Sleep data not recorded on some nights
- Spot check feature fails consistently
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- Ring disconnects randomly from phone
- Data loss after app updates
- Bluetooth pairing failures
- Heart rate sensor stops working
- Ring only connects when on charger
- Step count shows 99,000+ steps in single day
- Sleep timing off by hours
- Counts steps while sedentary
- App won't update or update breaks functionality
- Ring won't pair after factory reset
- Temperature readings inaccurate
- Data syncing delays
- Metrics not tracking after updates
Requested features
18 requests- Apple Health integration
- Manual sleep and activity logging/editing
- Automatic workout detection
- Advanced cycle tracking with temperature insights
- Pregnancy tracking mode
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- Intimacy tracking
- Custom mood and symptom options
- Real-time temperature data for ovulation tracking
- Notifications for health changes (heart rate, temperature)
- Nap tracking capability
- Spot check reliability improvements
- Data retention beyond 2 weeks
- Detailed analytics and health correlations
- Workout app integration
- Temperature graph visualization
- More than three goal options
- Wireless charging case
- Symptom logging buttons like Apple Health
In-app purchases
OOVA
No in-app purchases
Evie Ring
No in-app purchases









