Comparison

PeakDay Fertility Tracker App vs NFP Tracker

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

Head to head
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.

About

NFP Tracker

Features
Read full description

NFP Tracker is a privacy-first charting app for individuals or couples practicing natural family planning. Log the observations you already track each day in one simple place: • Bleeding • Monitor readings • Mucus observations • Temperature • Symptoms • Notes Designed to replace paper charts and spreadsheets, NFP Tracker helps you keep consistent records and review your cycle history over time. Features: • Daily observation tracking • Shared access for spouses • Calendar and cycle history views • Reminders to log observations • CSV and PDF export options • Support for multiple NFP approaches, including Marquette, Creighton, Billings, and sympto-thermal tracking NFP Tracker provides educational summaries based on the data you enter. It is intended for tracking and recordkeeping only and does not provide medical advice, diagnosis, or treatment. Consult a licensed clinician or certified instructor for interpretation and guidance. NFP Tracker Terms of Use: https://nfptracker.com/terms NFP Tracker Privacy Policy: https://nfptracker.com/privacy Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PeakDay Fertility Tracker App4 screens
NFP Tracker3 screens

Verdict

The call

The clearest difference is update cadence: NFP Tracker at every 5 days against PeakDay Fertility Tracker App's every 6 weeks. On price, ads, in-app purchases and device support 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. PeakDay Fertility Tracker App sells 3 in-app purchases, starting at $9.99 per month and NFP Tracker sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PeakDay Fertility Tracker App ships an update every 6 weeks, NFP Tracker every 5 days. The most recent releases landed on November 12, 2026 and November 5, 2026 respectively.

Scorecard1 real difference · 9 level
PeakDay Fertility Tracker App versus NFP Tracker: the parameters behind the verdict, then further details
ParameterPeakDay Fertility Tracker AppNFP Tracker
PriceFreeFree
Rating3.1 (27 ratings) — better—
Positive reviews59.6% of reviews—
Number of ratings27 — better—
Update frequencyEvery 6 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.0 — better
Further details — not scored
Size42 MB29 MB
Age rating12+17+
DeveloperCouple to Couple LeagueMitchell Fisher

Bugs and requests

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

NFP Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

PeakDay Fertility Tracker App

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

NFP Tracker

Subscriptions2
  • Access (monthly)$9.991 Month
  • Access (yearly)$64.991 Year

Questions

Is PeakDay Fertility Tracker App free?
PeakDay Fertility Tracker App is free to download, with in-app purchases available.
Is NFP Tracker free?
NFP Tracker is free to download, with in-app purchases available.
Do PeakDay Fertility Tracker App or NFP Tracker have ads?
Neither PeakDay Fertility Tracker App nor NFP Tracker shows ads.
Which is updated more often, PeakDay Fertility Tracker App or NFP Tracker?
PeakDay Fertility Tracker App ships an update every 6 weeks, and NFP Tracker every 5 days. Most recently, PeakDay Fertility Tracker App was updated on November 12, 2026 and NFP Tracker on November 5, 2026.

Other comparisons