Comparison

PairCare Shared Period Tracker vs HerFlow

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

Head to head
About

PairCare Shared Period Tracker

This app helps users track their menstrual cycles, predict ovulation, and share health insights with a partner. It offers personalized advice and self-care tips based on cycle phases, supporting users through fertility, conception, and pregnancy.

Highlights
  • AI-powered cycle and ovulation predictions
  • Personalized reminders for cycle phases
  • Shared health insights with partners
  • TTC and pregnancy tracking modes
  • Daily advice and self-care tips
  • Symptom and mood logging
  • Cycle trend analysis
Features
Read full description

Trusted by over 1 million users in Japan,
PairCare is a period and health tracking app designed to help you understand your menstrual cycle — and share that understanding with your partner. PairCare helps you track your cycle, predict upcoming periods and ovulation, identify fertile windows, and stay connected through shared schedules and health insights. Whether you’re managing your cycle, preparing for pregnancy, trying to conceive, or navigating pregnancy, PairCare supports you through every stage of your journey. Why Choose PairCare? • Track your menstrual cycle with AI-powered predictions for upcoming periods and ovulation. • Receive gentle reminders before your expected period and key cycle phases. • Share your cycle, schedule, and health status with your partner, family member, or someone you trust.
 • Connect accounts in just three simple steps and choose what information to share.
 • Make planning, communication, and TTC more collaborative by keeping partners informed and involved. • Switch seamlessly between three modes: period & health tracking, trying to conceive, and pregnancy tracking. • Continue using PairCare as your needs and life stage change. • Receive daily advice and self-care tips tailored to your current cycle phase. • Insights update every day based on your cycle. • Easily log physical symptoms such as cramps or headaches, as well as emotional states like irritability or low mood. • View recurring symptoms, moods, and cycle trends to better understand your body over time. • Use insights to prepare for certain phases, plan rest or time off, and support conversations with healthcare providers. How PairCare works 1. Enter your last period date and typical cycle length 2. PairCare predicts your next period and ovulation 3. Receive reminders as your next period approaches PairCare is recommended for people who want to: • Know their upcoming period or ovulation timing • Track and analyze physical and emotional symptoms • Receive cycle-based insights and guidance • Share schedules and health information with a partner • Help their partner better understand menstruation • Navigate TTC or pregnancy together as a couple Enjoy more features with PairCare Premium • Advanced symptom and mood analysis with personalized insights • Cycle length and period duration analysis • Fertile timing insights • Increased notification options • Partner notifications after health logs • Flexible sharing controls for partner visibility • Weight and basal body temperature charts • Google Calendar integration • Ad-free experience • Access to full cycle history • Photo logging for personal records Please note: PairCare does not provide medical diagnosis or treatment.
Predictions and insights are for informational purposes only and are not a substitute for professional medical advice.
Always consult a qualified healthcare provider for any health concerns or decisions. Privacy Policy: https://paircare.jp/document/privacy/en/ Contact: info@paircare.jp

About

HerFlow

Track your menstrual cycle and share insights with loved ones. Offers personalized tips and educational content to foster understanding and connection between partners, friends, and family.

Highlights
  • Intuitive cycle calendar
  • Period and fertile window prediction
  • Mood and symptom logging
  • Phase-specific insights
  • Shared tracking with partners
  • Supportive tips for loved ones
  • Cycle education
Features
Read full description

Free. No ads. No account. No tracking. Your cycle is personal. Your period app should respect that. Meet HerFlow: a private space to understand your body, feel more prepared and help the people you love support you. Start without signing up, keep your name to yourself and track your own cycle for free. MORE UNDERSTANDING. LESS GUESSWORK. Get to know the patterns behind your periods, moods and energy. See what may be coming, capture how you feel and make sense of your cycle, one day at a time. FEEL UNDERSTOOD BY THE PEOPLE YOU LOVE Your cycle can be easier to talk about when you don't have to explain everything from scratch. Share your random code with a partner, friend or family member so they can follow your cycle phase and find thoughtful ways to support you. Choose when to share a mood or note. Pause sharing or change your code whenever you want. SMALL DETAILS. EVERYDAY DIFFERENCE. • Feel more prepared with a period calendar, estimated ovulation and fertile days. • Get to know all five cycle phases with everyday self-care tips. • Make space for how you feel: log moods, symptoms, flow and personal notes. • Spot patterns in cycle length, period length and mood over time. • Stay on top of your routine with period, daily check-in, medication and contraception reminders. • Make HerFlow yours with eight themes and a Home Screen widget. • Save confirmed periods, flow and selected symptoms to Apple Health when you choose. PRIVATE, WITHOUT THE SIGN-UP No account or real name required. No ads, advertising tracking or usage analytics. Your name stays on your device. Sharing uses a random code: a small cycle summary is stored on our server when you set up your cycle, even before you share the code. You can turn sharing off. Moods and notes are uploaded only for days you choose to share. FREE FOR YOUR OWN CYCLE Personal cycle tracking is free, with no time limit. Following someone else's cycle is available through the optional People subscription, with a free 7-day trial requiring no payment, then monthly or yearly plans. Made by one independent developer. Available on iPhone and iPad, in 15 app languages. Get to know your cycle. Let your people get to know you better. Questions or ideas? support@herflowapp.com HerFlow is not a medical device or a form of birth control. Predictions are estimates. Terms of Use: https://herflowapp.com/terms.html Privacy Policy: https://herflowapp.com/privacy.html

Screenshots

PairCare Shared Period Tracker4 screens
HerFlow4 screens

Verdict

The call

PairCare Shared Period Tracker and HerFlow both sit at 4.7 stars, but that hides the real split: 100% of HerFlow's written reviews are positive against 18% of PairCare Shared Period Tracker's. HerFlow also leads on ads (none vs shown) and update cadence (every 4 days vs fortnightly). PairCare Shared Period Tracker's advantage is iOS requirement (15.1 vs 17.6). On price, rating, 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. PairCare Shared Period Tracker sells 4 in-app purchases, starting at $9.99 per month and HerFlow sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for PairCare Shared Period Tracker against 4.8 for HerFlow. Both are backed by a comparable volume of ratings — 13 and 5 respectively. Written reviews are what separate them: 18% of PairCare Shared Period Tracker's written reviews are positive against 100% of HerFlow's.

UpkeepUpdate frequency

PairCare Shared Period Tracker ships an update fortnightly, HerFlow every 4 days. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
PairCare Shared Period Tracker versus HerFlow: the parameters behind the verdict, then further details
ParameterPairCare Shared Period TrackerHerFlow
PriceFreeFree
Rating4.7 (13 ratings)4.8 (5 ratings) — better
Positive reviews18.2% of reviews100.0% of reviews — better
Number of ratings13 — better5
Update frequencyFortnightlyEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 — better17.6
Further details — not scored
Size115 MB7 MB
Age rating4+12+
DeveloperEntale, Inc.Stefan Dasic

Customer experience

PairCare Shared Period Tracker

All ratings13 ratings
Positive92.3%
Neutral0.0%
Negative7.7%
Written reviews22 reviews
Positive18.2%
Neutral27.3%
Negative54.5%

HerFlow

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

PairCare Shared Period Tracker

Subscriptions4
  • PairCare Prem 1-Mo Sub$9.991 Month
  • PairCare Prem 3-Mo Sub (1 Mo Free)1 Month trial$19.993 Months
  • PairCare Prem 12-Mo Sub (1 Mo Free)1 Month trial$27.991 Year
Show 1 more
  • PairCare Prem 12-Mo Sub (1 Mo Free)1 Month trial$39.991 Year
2 purchases

HerFlow

Subscriptions2
  • People Monthly$0.991 Month
  • People Yearly$9.991 Year

Questions

Is PairCare Shared Period Tracker free?
PairCare Shared Period Tracker is free to download, with in-app purchases available.
Is HerFlow free?
HerFlow is free to download, with in-app purchases available.
Which has better reviews, PairCare Shared Period Tracker or HerFlow?
HerFlow is rated higher. PairCare Shared Period Tracker averages 4.7 out of 5 from 13 ratings, while HerFlow averages 4.8 from 5 ratings.
Do PairCare Shared Period Tracker or HerFlow have ads?
PairCare Shared Period Tracker shows ads; HerFlow does not.
Which is updated more often, PairCare Shared Period Tracker or HerFlow?
PairCare Shared Period Tracker ships an update fortnightly, and HerFlow every 4 days. Most recently, PairCare Shared Period Tracker was updated on November 4, 2026 and HerFlow on November 2, 2026.

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