Pair Rhythm W (Women Only) [Free]
Pair Rhythm W is a menstrual cycle prediction app that supports both the mind and body of women.
Simply record your period dates and automatically calculate your menstrual cycle!
Supports a wide range of uses, including menstrual management, basal body temperature, fertility, contraception, and PMS prevention.
Predicts women's unique rhythms, including predicted period and ovulation dates, and fertility.

Supervising Doctor>
LEADING GIRLS Medical Corporation
LUNA Group Women's Health Clinic, Chairperson
Dr. Yuki Sekiguchi (MD)

Recommended for Women
Recommended for women who want to manage their health, are hoping to have a baby, are hoping to get pregnant, or give birth, want to communicate their period and ovulation dates to significant others, and are trying to conceive as a couple.
Can also be used for PMS and contraception.

・Predict your period and ovulation date (menstrual management)
・Predict safe and unsafe days (contraception)
・Predict fertile and unfertile days (trying to conceive)
・Predict your physical condition and mood swings (PMS management)
・Basal body temperature graph
・Calendar
・Share your menstrual cycle and schedule with your partner
(All information is free)

Generally, the normal range for a menstrual cycle is considered to be 25 to 38 days, and the normal range for a menstrual period is considered to be 3 to 7 days. (Japan Society of Obstetrics and Gynecology)

Furthermore, cases where the menstrual cycle or period falls outside these ranges are called "irregular menstruation."

Irregular menstruation has a variety of symptoms, and while it may be manageable with observation, treatment may be required if a medical condition is involved.

Therefore, if your irregular symptoms persist, we recommend visiting a gynecologist and consulting a specialist.

★Sharing Features for Couples/Married Couples
If you're partnered (boyfriend or husband), you can sync your apps to share predicted data like your period and ovulation date.
This app supports information sharing between couples and married couples for a variety of purposes, including menstrual management, health management (PMS), fertility management (infertility prevention), and contraception.
◎Female users can use it alone.
◎You can also use it just to record your basal body temperature and period.
◎Pairing is available between Android devices.

(Not available on iPhone.)

★Industry-First "Pair App"
Pairism has two apps: a "Women's App" and a "Men's App."

The features and design of each app differ. (To share data, your male partner must install the "Men's Only App" and pair their apps.)

★How to Use
① Single Use (Free)
A variety of features useful for women's health management, including a calendar, basal body temperature graph, period prediction notification, ovulation prediction notification, and data storage (backup), are all available for free.

② Two-person Use (Free)
By pairing with your partner, you can share your menstrual cycle rhythm, which only women know, with your partner (boyfriend, husband, etc.).

★Simple Design
Features a simple, timeless flat design and an easy-to-understand, intuitive interface. We've focused on original specifications exclusive to Pair Rhythm.

★Main Features
① Period Prediction/Ovulation Prediction
Pair Rhythm offers uniquely expanded period and ovulation prediction programs.
While the normal menstrual cycle is generally considered to be between 25 and 38 days (Japan Society of Obstetrics and Gynecology), this app, supervised by medical specialists, supports your health management within this range of between 21 and 55 days.

The "Home" section compactly summarizes various forecast information, such as fertility (safe days, dangerous days), premenstrual symptoms (PMS), and menstrual symptoms, all in an easy-to-read layout. Simply launch the app to instantly check your due date.

② Period Record (Period Management)
Easily enter the start and end dates of your period with just two taps. Simply register the start date of your period and the app will reference past records and automatically calculate your latest menstrual cycle.

③ Rhythm Color
What color is it today?

Pair Rhythm divides your menstrual cycle into seven stages and clearly displays your mind and body rhythms using colorful "rhythm colors."

Just launch the app and you'll know your condition for the day at a glance.

④ Calendar
Switch between "Chance of Pregnancy" and "Physical Symptoms" (rhythm color) with a single touch.
You can also register schedules and notes using over 300 cute icons, making it perfect for managing events and anniversaries.

⑤ Basal Body Temperature
Basal body temperature is a barometer of your mind and body.
Simply enter your daily basal body temperature into the app and check it in a list.
(The basal body temperature list is managed by menstrual cycle, not by month.)

⑥ Basal Body Temperature Graph
A vertically-spaced graph displays your basal body temperature, number of days in your menstrual cycle, physical condition records, and pregnancy possibility (safe days, risk days), all on one screen.
"Jump" buttons on the left and right of the screen automatically adjust the graph display range for each menstrual cycle. Highest temperatures are displayed in red, and lowest temperatures in blue for easy viewing.

⑦ Medical Record
Easily record your daily physical and mental symptoms. ♪
Irritability, depression, lower abdominal pain, constipation, rough skin, swelling... Physical and mental discomfort is often linked to the rhythm of your menstrual cycle. By recording your daily basal body temperature and symptoms, you can easily understand when your physical condition changes during your menstrual cycle.

⑧ Thermometer Data Transfer (Optional Feature)
Compatible with TDK's basal body temperature thermometers "HT-201" and "HT-301." Up to seven sets of measurement data can be wirelessly transferred to the app.

- The basal body temperature thermometers "HT-201" and "HT-301" are sold separately. (Manufacturer and distributor: TDK Corporation)
- For detailed product specifications for the "HT-201" and "HT-301," please visit the TDK Corporation website.
- To use the thermometer data transfer feature, you'll need to perform a one-time initial setup (thermometer link) to connect the app to your thermometer.
- You can use this app on its own even if you don't link your basal body temperature thermometer.
- This app itself is not a medical device; it is a supplementary tool designed to support women's health care, including predicting their menstrual cycle and managing their basal body temperature.
- If you require diagnosis, treatment, cure, or prevention of a gynecological condition, or if you have any concerns about your physical condition, we recommend that you visit a gynecologist and consult a specialist.

⑨ Specialist Explanation
A specialist provides easy-to-understand medical explanations of female hormones and the menstrual cycle. Learn the correct information and use it as a reference for how you spend your day and interact with your partner.

LEADING GIRLS Medical Corporation
Chairman of the LUNA Group Women's Medical Clinic
Dr. Yuki Sekiguchi (MD)

⑩ Data Storage ~Backup~
By registering an account, you can save your app data on a dedicated server. This provides peace of mind, knowing that your data can be restored even if you change devices or experience device malfunction.

⑪ Prediction Notifications
Turn notifications on to receive advance notification of your predicted period and ovulation dates.

Android 5.0 or higher smartphones
◎ Tablet devices are not supported.
◎ Devices with a screen resolution of 960x540 or less are not recommended, as the app layout will not display optimally.