Fertility apps

Fertility apps

  • There are a number of apps marketed as fertility apps to track menstrual cycles, predict ovulation and plan conception.
  • Most apps are based on predictive algorithms and should be used with caution.
  • Read more about fertility apps reviewed by Healthify, and how to use fertility apps safely.
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Fertility apps are used to track your periods (menstrual cycles), ovulation and to help predict the time that you're most likely to become pregnant. The apps can help you become more aware of your menstrual cycle. However but for some people, even if they're having regular periods, there are other things that can affect ovulation each month, eg, hormone problems.

Fertility apps may not always be accurate

  • Most apps are based on predictions: Fertility apps are based on predictions of ovulation timing and when you're likely to be the most fertile, but this may not be accurate for everyone. The apps are often based on algorithms, which usually ask for dates of menstruation, information about your cycles and sometimes temperature, urine tests, and cervical fluid. Based on the information and algorithms, the apps estimate the date of your next period and your date of ovulation. Note, these may not always be accurate.
  • Privacy of your information: Fertility apps ask you for information when you signup (eg, typical period cycle and length) and then ask ongoing information about dates of your periods. Some apps don't say how your data is used for example whether the information is sold or shared to other companies
  • New Zealand specific apps: Currently there are no Aotearoa New Zealand specific fertility apps based on New Zealand guidelines. Most are overseas apps that include mostly American information.

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

Pearl Fertility

  • Diary/tracking.
  • Reminders. 
  • Graphs and reporting. 
  • Cost: App is free, but users must order the Pearl Fertility Kit.
  • Read more about Pearl Fertility
4 star review

Natural Cycles

  • Diary/tracking. 
  • Reminders.
  • Cost: Annual subscription $89.99 (includes thermometer).
    Monthly subscription $9.99/month (option to purchase thermometer for $14.50).
  • Read more about Natural Cycles
3 star review

Period Tracker Clue

  • Menstrual cycle tracking.
  • Health education.
  • Reports for sharing.
  • Reminders.
  • Cost: Free (basic); Paid (upgrade).
  • Read more about Period Tracker Clue
3 star review


  1. Ford EA, Peters AE, Roman P, et al. A scoping review of the information provided by fertility smartphone applications(external link) Human Fertility, 2021
  2. Zwingerman R, Chaikof M, Jones C. A critical appraisal of fertility and menstrual tracking apps for the iPhone(external link) J Obstet Gynaecol Can, 2020


Disclaimer: The NZ Health App Library is a free consumer service to help you decide whether a health app would be suitable for you. Our review process is independent. We have no relationship with the app developers or companies and no responsibility for the service they provide. This means that if you have an issue with one of the apps we have reviewed, you will need to contact the app developer or company directly.

Credits: Healthify editorial team. Healthify is brought to you by Health Navigator Charitable Trust.