Comparison

Period Log vs Premom

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

Head to head
About

Period Log

Track and predict your menstrual cycles, fertility, and ovulation. Log period days, flow, mood, symptoms, and more. Receive timely reminders and protect your data with password protection.

Highlights
  • Track period, ovulation, and fertile days
  • Predict future cycles and fertile windows
  • Log moods, symptoms, and flow
  • Visual calendar with icons
  • Customizable reminders
  • Password and Touch ID protection
  • Pregnancy mode with due date calculation
Features
Read full description

Period Log is designed for you to track and predict your fertility and menstrual cycles. With Period Log, you can track almost everything about your cycles, period days, cycle days, fertile days, ovulation day, flow, mood, symptom, intimate, spotting, breast self-exam, weight, temperature and notes. Period Log will make you life much easier. You can view details of your cycles at a glance, refer predicting periods to make well plans of date, private life, having baby, visiting doctor, and travel etc, doing something advance for important exam, match etc. Key Features: ⁃ Screen name is P. Log. ⁃ Track period, ovulation, fertile days, moods, weight and symptoms etc. ⁃ Predict following periods, ovulation and fertile days. ⁃ Two modules are provided to predict your periods, default days and average days. ⁃ Calendar design and icons to show your info visually. ⁃ Add or edit periods easily. ⁃ Receive reminder if periods is comings. ⁃ Receive reminder of breast self-exam. ⁃ Passwords to protect your info. ⁃ Supports Touch ID as passcode. ⁃ Help documents to help you how to use this app. ⁃ Pregnancy module is provided, calculates delivery date and days remains. ⁃ Support units of lbs and kg, °F and °C. ⁃ Supports Wifi backup and restore. ⁃ Supports Dropbox backup and restore. ⁃ Supports transferring data to Health app. ⁃ Supports universal version. ⁃ Supports Apple Watch version. Let’s your periods in control and prepare well when those days are coming, instead of being overwhelmed by her sudden visit. Please contact us by this email userfeed@vip.tom.com if you have any question or suggestion.

About

Premom

This app helps women track their menstrual cycles, predict ovulation, and monitor fertility. It offers personalized guidance, digital ovulation test reading, and basal body temperature charting to aid in conception. Features include cycle analysis, symptom tracking, and expert consultations for a smoother fertility journey.

Highlights
  • Ovulation test scanning and LH level quantification
  • Automatic basal body temperature (BBT) charting
  • PCOS AI for interpreting BBT and OPK trends
  • Partner account linking for shared updates
  • Pregnancy mode with due date calculation and tips
  • Period logging calendar with symptom tracking
  • Virtual consultations with fertility experts
Features
Read full description

Join over 1.5 million women who have gotten pregnant while using Premom, your all-in-one period tracker and ovulation app.* How does Premom accurately track my ovulation? Developed by the trusted Easy@Home brand, Premom’s smart algorithms analyze your cycle and ovulation tests to predict your fertile window with precision. How can Premom support my TTC journey? With FastPass™ to Pregnancy, get expert guidance and personalized education designed to help you conceive faster. Whether you’re tracking your period or trying to conceive, Premom provides the tools—like our digital ovulation test reader and automatic basal body temperature (BBT) charting—to remove the guesswork from your fertility journey. Why is my menstrual cycle irregular and what do these symptoms mean for my fertility? Take a Self-Assessment to explore your cycle patterns and get tips to support your cycle health and chances of getting pregnant. I have PCOS, how can I find my fertile window? Premom’s PCOS AI interprets BBT and OPK trends to spot fertile signs, while our specialized nutrition plan supports your metabolic health. Because it takes two, invite your partner to Predad™. Link their account to see your cycle or pregnancy updates, receive fertility insights, and get key ovulation reminders. Upgrade to Premom Premium for advanced cycle reports, personalized content, enhanced pregnancy tracking, and webinars with fertility experts. Premium members saw pregnancy rates up to 229% higher than non-members!** OVULATION CALCULATOR & FERTILITY TRACKER • Scan your ovulation tests and quantify your LH levels to know when you will likely ovulate. Know your chances of pregnancy with easy fertility readings of low, high, and peak. • Our smart BBT thermometer auto syncs and charts your temps next to other signs of fertility • Sync with Apple Health app to export or import BBT or wrist-temperature data PREGNANCY TRACKER How does Premom support my pregnancy by week? Monitor your baby’s growth and know what to expect with Premom Pregnancy Mode: • Calculate your due date • Get daily tips to manage symptoms and prepare for childbirth • Enjoy a personalized, smoother pregnancy journey CYCLE & PERIOD CALENDAR • Easy period logging calendar that adjusts based on your ovulation test and BBT data • Keep track of 50+ PMS, mood swings, and other symptoms to monitor hormonal changes throughout your cycle LEARN FROM HEALTH EXPERTS • Schedule a virtual consultation with experts to help interpret your chart and cycle tracking from home • Optimize your cycle with physician-designed reports • Export your cycle data to share with your doctor SUPPORTIVE COMMUNITY • Ask questions and search for advice from preconception through pregnancy. Share your fertility tests and BBT charts to receive support from thousands of women. SUBSCRIPTION INFORMATION Premom offers a subscription service (“Premium”) that provides you with a more personalized experience, physician-designed cycle insights and expert services. • Payment will be charged to your iTunes account after payment confirmation • Subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current billing cycle • Your iTunes account will be charged for renewal within 24 hours of the end of the current billing cycle • Subscriptions can be managed and auto-renewal may be turned off by going to your Account Settings after purchase For more info, visit: https://support.apple.com/en-us/HT202039 Guarantee: https://premom.com/money-back-guarantee Privacy Policy: https://premom.com/privacy-policy Terms of Service: https://premom.com/terms-of-service Questions? Email support@premom.com *Over 1.5 million users logged pregnancy or positive pregnancy test results while using Premom app **Based on internal analytical studies of 1.73 million users registered for 6 months

Screenshots

Period Log4 screens
Premom4 screens

Verdict

The call

The clearest difference is in-app purchases: Period Log at none against Premom's 10. Period Log also leads on review sentiment (92% vs 70%). Premom's advantage is ads (none vs shown) and update cadence (weekly vs every 7 months). On price, rating 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. Premom sells 9 in-app purchases, starting at $12.99 per month. Period Log asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Period Log against 4.8 for Premom. That said, the two scores are not equally well evidenced: Premom has 61K ratings behind it against 1.2K, so its average is the more settled of the two. Written reviews are what separate them: 92% of Period Log's written reviews are positive against 70% of Premom's.

UpkeepUpdate frequency

Period Log ships an update every 7 months, Premom weekly. The most recent releases landed on November 6, 2026 and November 12, 2026 respectively.

Scorecard8 real differences · 3 level
Period Log versus Premom: the parameters behind the verdict, then further details
ParameterPeriod LogPremom
PriceFreeFree
Rating4.7 (1.2K ratings)4.8 (61K ratings) — better
Positive reviews91.9% of reviews — better69.8% of reviews
Number of ratings1.2K61K — better
Update frequencyEvery 7 monthsWeekly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFreemium
Best chart rank—#47 — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size54 MB270 MB
Age rating4+12+
Developer倩 赵Easy Healthcare Corporation

Customer experience

Period Log

All ratings1,208 ratings
Positive93.8%
Neutral3.6%
Negative2.6%
Written reviews467 reviews
Positive91.9%
Neutral3.9%
Negative4.3%

Premom

All ratings60,954 ratings
Positive94.9%
Neutral2.0%
Negative3.1%
Written reviews1,605 reviews
Positive69.8%
Neutral6.5%
Negative23.7%

User reviews

Period Log

From 1.2K App Store ratings

What we love

  • 👍 Easy to use
  • 📆 Helpful for tracking cycles
  • ⏰ Accurate period predictions
  • 📝 Ability to log symptoms and moods
  • 💻 Simple and straightforward interface

Room to improve

  • 💸 Too many ads in free version
  • 🐛 Occasional bugs or glitches
  • 🔄 Difficulty editing or deleting entries
  • 🔍 Limited customization options
  • 📊 Inaccurate ovulation predictions for some users

Premom

From 61K App Store ratings

What we love

  • 🚀 Accurate ovulation tracking
  • 👍 Easy to use app
  • 💡 Helpful community support
  • 🚀 Affordable ovulation tests
  • 👍 Detailed cycle analysis

Room to improve

  • 🐛 Inconsistent data tracking
  • 🐛 Frequent app crashes
  • 🐛 Inaccurate ovulation predictions
  • 🔒 Privacy concerns with data sharing
  • 🔋 Drains battery quickly

Bugs and requests

Period Log

Reported bugs

3 issues
  • Data not saving properly after app updates
  • Calendar view not displaying all entries correctly
  • Notifications not working as expected

Requested features

5 requests
  • Option to remove ads
  • Ability to sync data across devices
  • More detailed symptom and mood tracking
  • Customizable reminders and notifications
  • Integration with other health apps

Premom

Reported bugs

3 issues
  • Inability to log miscarriage data
  • Syncing issues with Bluetooth thermometers
  • Ovulation test results not accurately detected

Requested features

4 requests
  • Ability to edit past data entries
  • Option to switch between Celsius and Fahrenheit
  • More customization options for the calendar view
  • Enhanced data export capabilities

In-app purchases

None

Period Log

No in-app purchases

9 purchases

Premom

Subscriptions9
  • Premom$12.991 Month
  • Premium (US)$20.493 Months
  • Premium$20.493 Months
Show 6 more
  • Premom Fertility Tracker$23.493 Months
  • Premium (US)$26.993 Months
  • Premom$35.996 Months
  • Premium7 Days trial$37.996 Months
  • Premium$37.996 Months
  • Premium6 Months trial2 variants$37.996 Months

Questions

Is Period Log free?
Period Log is free to download, with no in-app purchases.
Is Premom free?
Premom is free to download, with in-app purchases available.
Which has better reviews, Period Log or Premom?
Premom is rated higher. Period Log averages 4.7 out of 5 from 1.2K ratings, while Premom averages 4.8 from 61K ratings.
Do Period Log or Premom have ads?
Period Log shows ads; Premom does not.
Which is updated more often, Period Log or Premom?
Period Log ships an update every 7 months, and Premom weekly. Most recently, Period Log was updated on November 6, 2026 and Premom on November 12, 2026.

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