Period. is the world’s simplest free ovulation tracker, fertility tracker and period tracker with powerful prediction algorithms and fertility & ovulation calculations


"Why are period apps so complicated and why do they need my email? Period is simple, discreet and my data never leaves my phone." - Ruth S.

Period. is the world’s simplest free ovulation tracker, fertility tracker and period tracker with future period predictions. Get a detailed overview of your entire cycle - record your period and monitor your fertility symptoms get more accurate fertility & ovulation predictions. 

Keep track of your menstrual cycle and reproductive health, get notifications when you start your fertile phase, expect the next period to start or miss a period. It’s the simplest app for tracking your period and ovulation - PERIOD.

Period. app is safe for people of all religions since it tracks natural fertility symptoms also known as the Billings method developed in the 1950s.


+ Powerful and accurate period cycle prediction algorithm
+ SMART ALGORITHM - Learns each time you log your menstrual cycle and menstrual symptoms to give the most accurate data
+ Smart notifications lets you know when you’re ovulating
Tracks weight, flow, intimacy and temperature
+ Real cycle lengths because not everyone menstruates every 28 days in a perfect menstrual cycle


+ Accurate period, ovulation and fertility tracker with a learning ability
+ Enter data about your symptoms and sexual activity along with your temperature
+ See predictions 3 or more months in advance
+ Know exactly when your next period will be
+ Take daily notes of symptoms, birth control pills and intimacy


A whole section with common questions you were afraid to ask, explaining every detail about your menstrual cycle, regularly update with new questions and answers.


Detailed overview and data that’s easy to read
Easy and elegant scrolling though options and different parts of the app
User friendly - master using the app in less than a few minutes

Just remember PIP and PUF: Pink for Period, Purple for Fertility. Calendar shows predicted menstrual cycles with outlines, while full colored ones are your own inputs.

Privacy Policy

Terms of Service

What’s New

Version 2.0.13

Thank you for your comments and reviews, we appreciate it!

We are reading your comments and making fixes and improvements, this update reflects that - brings bug fixes and improvements. More updates will be coming soon. Stay healthy!

Ratings and Reviews

4.0 out of 5
260 Ratings

260 Ratings

eeeiiillleeennn ,


I am pleased with the app. It is informative and helpful. However my confusion lies in the color coordinating. The period diagram has pink that then turns white and then purple. I don’t understand what the color coordinations are indicating.

annoyedbecauseallnamestaken ,

Can’t set last period end date.

I just downloaded this, happy to find an app that doesn’t track ridiculous things like kissing. I’d even happily pay $5 to remove ads if it works. However, the app defaults to the current date for your last period and the number of days out your period typically lasts as the end date. I can change the start date to the actual date of my last period, but i cannot change the end date. Every time I try, it goes back to the last day of the month, indicating a 27 day period... There is no support on the website.

ishipnizza1 (kerrigan) ,

not great

I downloaded this for the minimalistic design, however this app is not intuitive at all. I’m currently irregular and this app does not change its predictions with a changing cycle. Also the options for logging cervical fluid, body temperature, contraceptive pill, etc. are kind of a one size fits all approach, I wish there was an app that you could customize to apply more to my body.

App Privacy

The developer, Tiskol apps, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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