The only free and precise symptothermal fertility tracking app on internet! Natural contraception is guaranteed when used correctly after 6 month Premium Follow up. No ads with the Premium version.

No (fake) predictions! No hidden costs!

sympto is an educational tool, not a medical device.

Introduction videos to get you started.

sympto includes 15 days of free personalized assistance by a natural family planning counsellor from the SymptoTherm Foundation and the option to subscribe to future months of additional counseling if you want more help.

sympto allows you to track your fertility with the most widely used and effective natural family planning method available. This all-natural method is easy, free, scientifically proven (see app comparison studies on, and can be used to achieve or avoid pregnancy. On sympto, the different symptothermal methods have been put into a new synthesis, which substantially improves the method and enhances its user-friendliness.

sympto calculates your fertility using the "symptothermal" method, which means your basal body temperature (on some days indicated by sympto) is combined with cervical fluid observations (plus optional internal cervical observations) in a cross-checking way to accurately determine the fertile and infertile portions of your cycle. A full user manual explains all these terms in much more detail on

Other Features:

*Special functions built in for pregnancy, breastfeeding, and peri-menopause.

*"Pilot Mode" option guides you through your first cycle with instructions at every step, and can be turned off when you are ready to use sympto without it.

*Easy to use icons with detailed explanations to help you select the right option for each day.

Note: When used correctly, the symptothermal method has been proven 99,4 PI effective in accurately identifying fertility and avoiding pregnancy for those who wish to do so. Incorrect or incomplete use may lower the effectiveness of this method.

Visit for more information about The SymptoTherm Foundation or about the symptothermal method.

What's New

Version 1.51

Nouveaux textes, corrections clavier iPad

Customer Reviews

Excellent method!

Mil Feliz

This methodology is excellent to get to know your body and get the results u eant (baby or birth control). i combine this with the use of a Lady Comp and it works great. It is not a recipe, its a method to be learned and during the trial period it is all free! incl coinsellong from experts, so they can help w your questions. This is the trial version, good for a month. U can get the paid app, and have permanent access to the charts on your smartphone (not available for desktop), if u need to print just "publish" your cycle on the main website and u can print your history.
Very good assistance, have used formore than a year and whenever i have had difficulties with the app i write and receive a response in less than 24 hrs. Worth trying. Support literature available on the website for free as well.

Comprehensive for experienced users


I really like this app and the way it's set up is great for users who have previous experience charting their fertility symptoms on paper. I did this years ago when I was trying to have a baby, and now I'm using it to NOT get pregnant. I love that it has settings for peri menopause and breastfeeding and I can change my goals as necessary. The translation is a little awkward, but the supporting materials on the website are very helpful and I was surprised to get personal messages from the staff. The initial pilot mode will help you get started.

Good while it lasted

Steady Faithful User

I used this app faithfully for almost three complete cycles and things were great minus the annoying delay I had to wait to add updates if I wasn't in a wifi area. Now I can't even get in no matter where I am. The thing is either loading for-ever! or it gives me a blue you must connect to the Internet screen when I am connected-so annoying.
The thing was great while it lasted and when it was working. Now it's just a waste and desperately needs to be updated- I don't know how long it's been since its makers gave it some attention but it needs it now more than ever!!


Harri Wettstein
35.1 MB
Health & Fitness
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Bulgarian, French, German, Italian, Polish, Russian, Spanish
Age Rating
Rated 12+ for the following:
Infrequent/Mild Sexual Content and Nudity
Infrequent/Mild Medical/Treatment Information
© 2009-13 SymptoTherm Foundation


  • Family Sharing

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

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