Comparison

D Minder Pro vs Tempdrop

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Tempdrop

This app works with a specialized thermometer to track subtle overnight temperature changes. It helps identify hormonal fluctuations throughout the menstrual cycle, pinpoint ovulation, and predict cycle phases. The data supports fertility awareness and cycle tracking.

Highlights
  • Basal body temperature tracking
  • Ovulation pinpointing
  • Menstrual cycle prediction
  • Hormonal fluctuation correlation
  • Fertility awareness support
Features
Read full description

The Tempdrop app is designed to complement the Tempdrop device - a personalized user-specific thermometer that captures minute temperature variations throughout the night to pinpoint the basal body temperature. Detected variations in temperature correlate with hormonal fluctuations throughout the menstrual cycle. When used with the Tempdrop device, this app can help users to pinpoint ovulation and effectively track and predict the varying phases of the cycle. Disclaimer: The Tempdrop sensor and app are intended as complementary instruments to enhance your ability to monitor your fertility and share health details. The app and its wearable sensor, in themselves, are not, nor are they intended to be, a fertility monitor, a substitute for contraception, or a birth control method. We recognize the need of some to use the data and information provided to support ongoing health and menstrual cycle tracking, however, it is important to note that this should NOT be used as a substitute for an in-presence qualified professional, medical analysis, advice, guidance, or treatment. We strongly advise seeking a qualified Fertility Awareness instructor or other self-teaching resources to learn a symptothermal method and support your fertility journey. The provided interpretations and prediction guidelines are not suitable for use with irregular cycles. Optimal performance is dependent on correct and consistent use. Individual usage, wearing, input, and circumstances can affect the data. The user is fully responsible for the individual data inputs. The Tempdrop Sensor is approved for use in the USA, and is registered in the FDA database under registration number 3016099071. The device is classified as "Device, Fertility Diagnostic, Proceptive”. A link to the terms of use - https://www.tempdrop.com/pages/tos A link to the privacy policy - https://www.tempdrop.com/pages/privacy-policy

Screenshots

D Minder Pro4 screens
Tempdrop4 screens

Verdict

The call

The clearest difference is ads: Tempdrop at none against D Minder Pro's shown. Tempdrop also leads on rating (4.2 vs 4.0) and iOS requirement (15.0 vs 17.0). D Minder Pro's advantage is update cadence (every 2 days vs every 3 months). On price, review sentiment, ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. D Minder Pro sells 2 one-off in-app purchases and Tempdrop sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Tempdrop holds the better App Store score, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 1.8K and 710 respectively. Written reviews point the same way: 34% of D Minder Pro's written reviews are positive against 38% of Tempdrop's.

UpkeepUpdate frequency

D Minder Pro ships an update every 2 days, Tempdrop every 3 months. The most recent releases landed on September 29, 2026 and September 30, 2026 respectively.

Scorecard4 real differences · 6 level
D Minder Pro versus Tempdrop: the parameters behind the verdict, then further details
ParameterD Minder ProTempdrop
PriceFreeFree
Rating4.0 (1.8K ratings)4.2 (710 ratings) — better
Positive reviews33.8% of reviews38.3% of reviews — better
Number of ratings1.8K — better710
Update frequencyEvery 2 days — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size37 MB103 MB
Age rating12+17+
DeveloperontometricsTempdrop Inc

Customer experience

D Minder Pro

All ratings1,765 ratings
Positive72.0%
Neutral6.2%
Negative21.8%
Written reviews674 reviews
Positive33.8%
Neutral13.4%
Negative52.8%

Tempdrop

All ratings710 ratings
Positive80.3%
Neutral6.2%
Negative13.5%
Written reviews167 reviews
Positive38.3%
Neutral18.6%
Negative43.1%

User reviews

D Minder Pro

From 1.8K App Store ratings

What we love

  • 🚀 Useful for tracking vitamin D levels
  • 🌞 Helps with safe sun exposure
  • 👍 Accurate calculations
  • 🔋 Doesn't drain battery
  • 💡 Innovative concept

Room to improve

  • 🐛 Crashes or bugs
  • 🔍 Difficult to use or navigate
  • 🔧 Lacks customization options
  • 📊 Inaccurate data or estimates
  • 💸 Paid version not worth the cost

Tempdrop

From 710 App Store ratings

What we love

  • 🚀 Convenient and easy to use
  • 🚀 Accurate temperature tracking
  • 👍 Helpful for fertility awareness and family planning
  • 👍 Empowering for understanding one's body
  • 👍 Useful for tracking hormonal fluctuations

Room to improve

  • 🐛 Issues with app syncing and functionality
  • 🔍 Limited symptom and data tracking options
  • 💰 Expensive device and subscription model
  • 👎 Poor customer service and support
  • 👎 Unreliable hardware and short device lifespan

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

Tempdrop

Reported bugs

4 issues
  • App crashes and freezes
  • Issues with syncing device data
  • Inaccurate cycle predictions and phase tracking
  • Temperature data changes over time

Requested features

5 requests
  • Improved sleep tracking capabilities
  • More customizable symptom and data tracking
  • Ability to manually confirm ovulation
  • Integration with other fertility/health apps
  • Support for irregular cycles and postpartum/breastfeeding phases

In-app purchases

2 purchases

D Minder Pro

One-time2
  • DMinder Premium$1.99
  • Lifetime Ad Removal$24.99
6 purchases

Tempdrop

Subscriptions6
  • Tempdrop Promo Premium monthly2 Months trial$2.991 Month
  • Tempdrop Premium monthly2 Months trial$6.001 Month
  • Tempdrop Promo Premium quarterly2 Months trial$7.993 Months
Show 3 more
  • Tempdrop Premium quarterly2 Months trial$15.003 Months
  • Tempdrop Promo Premium yearly2 Months trial$24.991 Year
  • Tempdrop Premium yearly*2 Months trial$48.001 Year

Questions

Is D Minder Pro free?
D Minder Pro is free to download, with in-app purchases available.
Is Tempdrop free?
Tempdrop is free to download, with in-app purchases available.
Which has better reviews, D Minder Pro or Tempdrop?
Tempdrop is rated higher. D Minder Pro averages 4.0 out of 5 from 1.8K ratings, while Tempdrop averages 4.2 from 710 ratings.
Do D Minder Pro or Tempdrop have ads?
D Minder Pro shows ads; Tempdrop does not.
Which is updated more often, D Minder Pro or Tempdrop?
D Minder Pro ships an update every 2 days, and Tempdrop every 3 months. Most recently, D Minder Pro was updated on September 29, 2026 and Tempdrop on September 30, 2026.

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