The 6 Best Period Tracker Apps for 2021 - Women's Health

The 6 Best Period Tracker Apps for 2021

And why you need to download one asap.

by | Aug 10, 2021

Have you ever been at the doctors and asked, “When was the first day of your last period?” And all you can say is something generic like, “Hmmm, a few weeks ago.”

Period trackers can be seriously useful tools for not only being able to answer that question correctly, but for helping you to learn more about your body: how your menstrual cycle is playing out, when you’re at your most fertile and which hormones are dominant, when.

They also play a huge part now in the women’s sport area – with the ability to identify when, during your cycle, you are able to hit peak performance – more about that here.

Are period trackers 100% correct?

They should be—that is, if you’re a woman who has a regular ovulatory cycle and who habitually updates the app.

While each app is different, using their own algorithms, they basically depend on your accurate input of info so that they can best generate an estimated day of ovulation, a five-to-six day fertile window, and the date of your next period. The longer you’re tracking your cycle, the more data the app’s algorithm has to work with, and the more likely it is to be correct.


Probably the most popular of the lot, the Flo app is used by millions of users daily to record ovulation and period symptoms, turning their data into super useful graphs that show exactly what your body is doing and when.

The Flow Premium offering goes a step further and offers personalised insights on your cycle & symptoms, health reports for your doctor, and a bunch of content that will answer basically every question you have about periods and conception.

Our favourite part: The chat feature.

The price: Free standard, from $19.49/6 months for FloPremium

Period Diary

A lot more basic than the other apps, Period diary allows you to log your period and symptoms, and provides information on your fertile window and potential ovulation date. In saying that it does have a pill reminder which ensures that you will never forget a dose ever again. Pretty neat.

Our favourite part: How easy it is to use

The price: Free


If you’re looking to get pregnant, the Ovia app might be your best bet.

It’s technically a fertility tracker so it really excels in helping you chart your basal body temperature, cervical position, and cervical mucus. But, unlike a lot of other fertility trackers, it has the ability to chart your period, too, and gives you predictions about your menstruation or fertility based on the data you input.

Our favourite part: how in-depth it goes

The price: Free


Clue is your choice if you’re not about all the flowers and glitter and just want a sleek data-based app that looks at your whole body. You can keep track of your cycle, fertility, mood, skin condition, digestion and energy. You can even log information about your period flow, menstrual products used, headaches, breakouts and cervical fluid.

Our favourite part: the multitude of options you have for what you can track

The price: Free standard, USD $5/month for Clue Plus

My Calendar

What’s cool about My Calendar is that it also includes programming to track irregular periods (we’re talkin’ to the 30 percent of women who experience irregular periods!), weight, temperature, moods, and blood flow, as well as sends reminders about birth control. With the ability to hide ovulation, fertility, and intercourse related data, this period tracker also works perfectly for girls and teens, as well as women who aren’t sexually active or have a partner who cannot get them pregnant.

Our favourite part: allows you to be discrete

The price: Free


If you experience particularly troubling systems just before your period like extreme sadness, hopelessness, irritability or anger, this app is for you. While you should first and foremost check with your doctor and find the support you need, this app is a great supplement to track your symptoms and hormonal changes in a clear way. The app uses a scale to track your mood, emotions, and physical effects like nausea, low energy and acne.

Our favourite part: it’s specialised to PMDD

The price: Free

How To Track Your Menstrual Cycle

What’s an example of them being wrong?

Your period tracking app can be wrong if you’re a woman with an irregular or variable cycle. “For example, if your cycle ranges from 28 to 32 days in length, the ovulatory window shifts three to four days each month,” says Dr. Kudesia, a reproductive endocrinologist and clinical assistant professor of obstetrics and gynecology at Houston Methodist. “Though the app shouldn’t miss the entire fertile window, it may be unable to pinpoint the exact day of ovulation.” Similarly, if you have a cycle longer than 35 days, there is, in Dr. Kudesia’s words, “a substantial likelihood” that you’re not regularly ovulating, which the app may not flag as possibility.

Can they ever be used as a reliable method of contraception?

First off, know that no period tracker offers 100% – or even 99% – protection from pregnancy. Secondly, there is a difference between a certified medical contraceptive app and period trackers. While period trackers certainly can show you your fertile Windows and in effect you can avoid sex during those periods (though the ‘fertile window’ they give may not be fully accurate), they can’t stop you from having unprotected sex.

Thankfully, there are a bunch of period tracking apps available for download that make tracking your period really easy. From the paid to the freebies, check out our picks above.

This Guy Tracks His Wife’s Periods And Honestly, It’s Genius

By Nikolina Ilic

Nikolina is the new web-obsessed Digital Editor at Men's and Women's Health, responsible for all things social media and .com. A lover of boxing, she has a mean punch inside and out of the ring. She was previously a Digital Editor at GQ and Vogue magazine.

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Thankfully, a number of brands are here to cater to your exercise needs with innovative materials, fabrics and sustainable options to see you through a summer of movement. Regardless of your workout preferences or daily activity, we’ve selected the best shorts that will ensure you feel good in your body, shorts that get you excited to embrace the day and attack it with energy, that make you want to get outside and enjoy the outdoors, whether it be walking, running, or socialising in the park. Here are our pick of the best bike shorts below. 


Uptown Biker, $240

What says summer more than a pop of orange and the sleek shape of these Nagnata biker shorts? With its mid-length and horizontal raised rib side detail, these are shorts you can wear both for a workout and out to meet the girls. Made in Australia with a technical knit fabrication, the double-layer jacquard provides gentle sculpting qualities for the body, making it an excellent choice for light to moderate fitness activities like yoga, pilates or barre. 

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New Balance

Q Speed Fuel Short, $70

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All Access

Ultra High Rise Zip Front Biker Short, $78

Yes, the colour is amazing but the fit is equally sensational on these All Access shorts. For those who love a high-rise fit and wide waistband that holds you in at the waist, look no further. The sleek, shiny look offers mid-compression and the fabric is moisture-wicking, so you can stay comfortable even during your sweatiest workouts. 


Nike x Naomi Osaka Utility Short, $90

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Outdoor Voices

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Align High-Rise Short 6”, $69

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Spiritual Gangster

Seamless Biker Short, $112

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