Comparison

Tempdrop vs PeakDay Fertility Tracker App

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

Head to head
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

About

PeakDay Fertility Tracker App

This app helps track menstrual cycles and fertility signs to predict ovulation and peak fertility days. It supports natural family planning and offers community support and educational resources for enhanced fertility awareness.

Highlights
  • Period and ovulation charting
  • Natural family planning support
  • Sympto-Thermal method compatibility
  • Customizable symptom tracking
  • Community forums with fertility coaches
  • Chart sharing with teachers/doctors
  • Cycle history comparison
Features
Read full description

PeakDay is a fertility cycle tracker that can be used for period charting or to assist with the practice of natural family planning. To help figure out your peak fertility for pregnancy, you record your daily fertility signs or symptoms, like basal body temperature and cervical mucus. Couple to Couple League uses this app in CCL and LLP classes to learn the Sympto-Thermal method of NFP. PeakDay is your partner for a happier, healthier, smarter fertility. PeakDay can be used for free for women looking to simply track their period and chart their ovulation cycle. The PeakDay premium version allows women to chart their fertility cycles and log health information to help determine their fertility phase and situation. PeakDay provides you with an easy way to chart your cycle and connect with a community of fertility coaches to ask questions. You can also use PeakDay to share charts with a teacher or doctor. Charts and data can be accessed from multiple devices, so both husband and wife can be involved in charting and grow in fertility awareness. For more than 50 years, thousands of couples have learned NFP with CCL and trusted our algorithms to help them track and interpret their cycles to determine peak fertility. Now, we are using that same highly effective formula and algorithm behind PeakDay. It’s trusted and has a proven success rate for over 10,000 users (previous version known as CycleProGo app.) 10 Ways PeakDay can work for you: 1. Track your cycles. Easy to chart your menstrual cycle and ovulation by simply inputting your symptoms and signs each day. 2. Manage your fertility goals. You can naturally plan your family by using the fertility phase information to achieve pregnancy. 3. Predict the PeakDay of your fertility so that you can make sound fertility decisions. 4. Connect with our fertility community. Participating in the message boards and forums on PeakDay puts you in touch with fertility coaches for guidance and greater knowledge. 5. Share your charts and cycle history with real fertility coaches on the app or even connect your account to a fertility teacher. 6. Easy to use to practice NFP. PeakDay is fully compatible with CCL’s Sympto-Thermal method of Natural Family Planning and is used in both CCL and Liga de Pareja classes. 7. Custom tracking of over 60 fertility symptoms and signs. You can choose what you want to track daily by personalizing the settings. 8. Compare your personal cycle history. To better understand your body and fertility, you can keep cycle history which can help discover patterns in your cycles. The comparing tool allows you to look at 6 months of cycles and see your personal cycle statistics. 9. Learn about women’s health and grow in fertility awareness. Our online learning center is connected to PeakDay with videos explaining the basics about fertility, cycles and how biomarkers like mucus and temperature are important to fertility tracking. 10. Your data is in your hands. PeakDay is password protected and allows you to keep the account private or share your account with a spouse, a fertility expert or even with your doctor. Looking for a reliable and simple fertility ovulation tracker or health app for women? Download PeakDay today to make that happen. Visit Peakday.com for more information about pricing, subscription options and learning materials. To learn CCL’s STM NFP method, please visit www.ccli.org. If you are looking for a NFP class in Spanish, visit www.ligadepareja.org For fertility coaching and other programs, visit www.fertilityscienceinstitute.org If you are having technical issues or have any questions, we are here to support you. support@peakday.com For full Privacy Policy and our Terms of Service: https://peakday.com/terms/ Disclaimer: This tool should not be used for medical purposes or as a substitute for medical advice. Actual performance and results are not guaranteed. Use at your own risk.

Screenshots

Tempdrop4 screens
PeakDay Fertility Tracker App4 screens

Verdict

The call

The clearest difference is rating: Tempdrop at 4.2 against PeakDay Fertility Tracker App's 3.1. Tempdrop also leads on ratings volume (714 vs 27). PeakDay Fertility Tracker App's advantage is review sentiment (60% vs 39%). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Tempdrop sells 6 in-app purchases, starting at $2.99 per month and PeakDay Fertility Tracker App sells 3 in-app purchases, starting at $9.99 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 3.1. That said, the two scores are not equally well evidenced: Tempdrop has 714 ratings behind it against 27, so its average is the more settled of the two. Written reviews complicate that: 39% of Tempdrop's written reviews are positive against 60% of PeakDay Fertility Tracker App's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Tempdrop ships an update every 2 months, PeakDay Fertility Tracker App every 6 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
Tempdrop versus PeakDay Fertility Tracker App: the parameters behind the verdict, then further details
ParameterTempdropPeakDay Fertility Tracker App
PriceFreeFree
Rating4.2 (714 ratings) — better3.1 (27 ratings)
Positive reviews38.7% of reviews59.6% of reviews — better
Number of ratings714 — better27
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size107 MB42 MB
Age rating17+12+
DeveloperTempdrop IncCouple to Couple League

Customer experience

Tempdrop

All ratings714 ratings
Positive80.3%
Neutral6.2%
Negative13.6%
Written reviews168 reviews
Positive38.7%
Neutral18.5%
Negative42.9%

PeakDay Fertility Tracker App

All ratings26 ratings
Positive46.2%
Neutral7.7%
Negative46.2%
Written reviews47 reviews
Positive59.6%
Neutral2.1%
Negative38.3%

User reviews

Tempdrop

From 714 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

PeakDay Fertility Tracker App

From 27 App Store ratings

What we love

  • 👍 Beautiful, simple interface
  • 👍 Affordable subscription
  • 👍 Good, reliable app
  • 👍 Helps improve and analyze charts
  • 👍 Effective for Sympto-Thermal Method

Room to improve

  • 🐛 Super glitchy
  • 🐛 Not acceptable for a paid app
  • 🐛 No longer allows data input after update
  • 🐛 Freezes during sign up
  • 🐛 Doesn't regulate data correctly

Bugs and requests

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

PeakDay Fertility Tracker App

Reported bugs

33 issues
  • Super glitchy
  • No longer allows data input after last update
  • Freezes during sign up
  • Doesn't regulate data like it should
  • Apple Watch syncing is clunky
Show 28 more
  • Health app needs to be open for temperature
  • Doesn't consistently sync temperature
  • Kicked me out of the app
  • No accounts associated with emails
  • App constantly crashes before sign up
  • Has to log in every time
  • Never remembers password
  • Marks period days as fertile
  • Makes whole menstrual cycle fertile
  • Network error, unable to access app
  • Glitches for more than 3 days
  • Wouldn't display fertility phase
  • Server error on login
  • Login information never saved
  • Majority of data doesn't save
  • Lost all charts
  • Cannot enter new data
  • Multiple server errors
  • Won't load beyond opening screen
  • Spins through options on iPad
  • Bug issues, not functioning
  • Won't save data after update
  • No chart during free trial
  • Chart screen blank, then spinning circle
  • No chart, observations not saved
  • Cannot see previous data
  • Technical issues still need fixing
  • Update did not fix loading issue

Requested features

5 requests
  • Integrate Bluetooth connectivity to oral basal thermometers
  • Import past data
  • Dark mode option
  • Advanced analytics dashboard
  • More user-friendly interface for iPad

In-app purchases

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
3 purchases

PeakDay Fertility Tracker App

Subscriptions2
  • Monthly$9.991 Month
  • Yearly$59.991 Year
One-time1
  • Chart Review$4.99

Questions

Is Tempdrop free?
Tempdrop is free to download, with in-app purchases available.
Is PeakDay Fertility Tracker App free?
PeakDay Fertility Tracker App is free to download, with in-app purchases available.
Which has better reviews, Tempdrop or PeakDay Fertility Tracker App?
Tempdrop is rated higher. Tempdrop averages 4.2 out of 5 from 714 ratings, while PeakDay Fertility Tracker App averages 3.1 from 27 ratings.
Do Tempdrop or PeakDay Fertility Tracker App have ads?
Neither Tempdrop nor PeakDay Fertility Tracker App shows ads.
Which is updated more often, Tempdrop or PeakDay Fertility Tracker App?
Tempdrop ships an update every 2 months, and PeakDay Fertility Tracker App every 6 weeks. Most recently, Tempdrop was updated on November 2, 2026 and PeakDay Fertility Tracker App on November 3, 2026.

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