D Minder Pro vs Cardia Sleep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
D Minder Pro
Track and manage your Vitamin D intake and sun exposure. This app calculates optimal sun exposure times based on your profile and location, and integrates with Apple Health for seamless data exchange. It also provides forecasts and notifications for vitamin D generation opportunities.
- Vitamin D tracking and management
- Apple Health integration
- Sun exposure calculation
- Optimal exposure time alerts
- Daily forecasts and solar position
- History and future event scheduling
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The idea behind this application is that it will help you track and manage your Vitamin D. This new version integrates with the Apple Health app to make seamless data exchange possible in the following ways: * on setup, profile information is fetched from the Health App if the user allows it * the user's weight (a factor in D generation) is fetched on an ongoing basis, making it unnecessary to update it * the app will write vitamin D doses, including session information into the Health app You setup basic information one time, like your height and weight and skin type and then any time you are outside, during the prescribed hours (and parts of the year), you can have it compute the amount of D you are getting in a stopwatch interface. It will also track how long you can stay out and warn you when the time is up. The application will notify you with the next opportunity to generate vitamin D. Each day, you can see forecasts based on your location, and you can also see the solar position, your generated vitamin D vs. target etc. In the Pro version, you can see your exposures's history and you will be able to schedule future events for next exposures. Weather data provided by Apple Weather. https://weatherkit.apple.com/legal-attribution.html Subscriptions: - D-Minder Pro Annual: $9.99/year (auto-renews) - D-Minder Pro Lifetime: $24.99 (one-time purchase) Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of Use: https://dminder.info/terms Privacy Policy: https://dminder.info/privacy
Cardia Sleep
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See What Your Heart Does in the Dark. Cardia Sleep is the only consumer sleep app focused on hemodynamic analysis — tracking how your heart rate dips during sleep, a clinically significant indicator of cardiovascular health that no other app surfaces. WHAT MAKES CARDIA SLEEP DIFFERENT While other sleep apps focus on wake-up alarms and generic quality scores, Cardia Sleep analyzes your nocturnal heart rate dipping pattern — the measurement cardiologists use to identify "Non-Dipping Hypertension," a condition linked to increased cardiovascular risk. YOUR NIGHTLY DIP DASHBOARD • Dip Percentage — how much your heart rate drops from day to night • Color-coded status — Dipper (healthy), Non-Dipper (at risk), or Reverse Dipper (critical) • Trend tracking — see if your dipping pattern is improving or worsening over time SLEEP SCORE (0–100) A composite score weighted across four clinical dimensions: • Duration — are you sleeping enough? • Deep Sleep — are you getting restorative sleep? • Heart Rate Dipping — is your cardiovascular system recovering? • HRV — is your nervous system properly resetting? SMART FEATURES • Morning Debrief — daily AI-powered summary of last night's sleep • Sleep Debt Tracker — know exactly how many hours you owe your body • 8 Achievement Badges — gamified milestones to build healthy habits • 14-Night Streak Tracking — consistency is key • Bedtime Reminders & Smart Notifications PRO FEATURES • Doctor-Ready PDF Reports — share your 30-day dipping trend with your healthcare provider • AI-Powered Insights (Ask Cardia) — get personalized answers about your sleep data • Unlimited Session History — see all your data, not just the last 7 days • Non-Dipper Streak Alerts — get notified after 3+ consecutive at-risk nights • Advanced Weekly Analytics — duration charts, stage breakdowns, HRV trends • Pro Achievement Badges PART OF THE CARDIA ECOSYSTEM Cardia Sleep works alongside Cardia Steps, Meds, Care, and more — connecting your sleep data to your broader health picture through a shared data layer. PRIVACY FIRST All your health data stays on your device. No accounts required. No third-party analytics. No cloud uploads. Your sleep data is yours. Requires Apple Watch for heart rate data during sleep. Not a medical device. For trend tracking and informational purposes only. Consult your healthcare provider for medical decisions. Terms of Use (EULA): https://keendigital.co/#/terms Privacy Policy: https://keendigital.co/#/privacy
Screenshots
Verdict
The clearest difference is ads: Cardia Sleep at none against D Minder Pro's shown. On price, in-app purchases, device support and iOS requirement 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. D Minder Pro sells 2 one-off in-app purchases and Cardia Sleep sells 1 in-app purchase, starting at $14.99 per year. Whichever you choose, the download price is not the number that matters.
| Parameter | D Minder Pro | Cardia Sleep |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1.8K ratings) — better | — |
| Positive reviews | 33.9% of reviews | — |
| Number of ratings | 1.8K — better | — |
| Update frequency | Every 2 days | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 37 MB | 2 MB |
| Age rating | 12+ | 4+ |
| Developer | ontometrics | Tuong Nguyen |
Bugs and requests
D Minder Pro
Reported bugs
5 issues- App crashes on launch or during use
- Location settings not working properly
- Inconsistent data or calculations between devices
- Inability to save or sync user data
- Overcast detection not functioning correctly
Requested features
5 requests- Add more food options for vitamin D
- Ability to edit past sun sessions
- Provide more detailed reports and analytics
- Add reminders or notifications for sun exposure
- Allow customization of skin type and location
Cardia Sleep
Not enough reviews yet to summarise bugs or requests.
In-app purchases
D Minder Pro
- DMinder Premium$1.99
- Lifetime Ad Removal$24.99
Cardia Sleep
- Cardia Sleep Pro$14.991 Year









