Period tracking apps are used to track periods and often predict when the next one is due. The main feature of period tracking apps is that they enable users to record their menstrual cycle, so they can help you become more aware of your menstrual cycle. Some period tracking apps include other features like symptom tracking such as amount of bleeding, pain, mood, etc or predictions of ovulation timing and the ‘fertile window’ (therefore claiming to assist fertility and conception). They may also include screening and clinical advice for endometriosis(external link), polycystic ovary syndrome(external link) (PCOS) and menopause.(external link)
Use period tracking apps with caution
- Most apps are based on predictive algorithms: Most apps have algorithms that produce predictions and suggestions for users. This process is not transparent, as algorithms are treated as commercially sensitive and so they're not revealed. There appear to be 2 types of predictive algorithm used by apps:
- Period tracking algorithms, which take user-input dates of menstruation along with standardised information about menstrual cycles and ovulation timing.
- Fertility algorithms, which incorporate user-input menstruation dates along with one or more user input physiological indicators of ovulation (eg, temperature, urine test, cervical fluid).
Both types of predictive algorithms offer estimates of the date of your next menstruation and your date of ovulation, although the accuracy of these estimate is open to question.
- Use of the information collected: To perform their functions period tracking apps require users to input information at signup (eg, typical menstrual cycle length) and users are requested to input ongoing information about dates of menstruation. Many apps are not transparent about how the sensitive data collected is used for example whether the information is sold or shared to marketers.
- Lack of New Zealand specific apps: Currently there are no Aotearoa New Zealand specific period tracking apps, which offer guidance based on New Zealand guidelines. Most are overseas apps that include generic or mostly American information.
Here are a few period tracking apps reviewed by Healthify
Before choosing an app, think about how it will benefit you and what you want it to be able to do.
- An app will only be helpful if you use it, so it needs to be something you like using and find easy to use.
- If you find the app difficult to use, or you don't like the imagery or look of it, or the language it uses, you may want to find another one that suits you better.
- For more guidance on how to choose health apps, see How to choose a health app.
- It's important to remember that apps don’t replace professional help or your doctor’s advice.
| App | Features | Clinical review |
Period Tracker Flo   |
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Period Tracker Clue  |
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Free version  |
