femSense fertility

femSense fertility

Hormone-free Family Planning

21 ratings
46 reviews
Free
With Ads

Details

  • Released
  • Updated
  • December 20, 2020
  • April 9, 2026
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About

This app helps users understand their menstrual cycle and fertility. It can be used to plan a pregnancy by identifying fertile days or as a free period calendar to track cycles and symptoms. It works with a smart sensor patch or as a standalone cycle tracker.

Fertility tracking
Ovulation prediction
Cycle calendar
Period tracking
Symptom logging
Smart sensor patch integration
NFC data reading
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What's New in femSense fertility

2.3.0

April 9, 2026

- We added support for unusual long cycles - Generic App improvements

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User reviews

Grundidee super, an der Umsetzung hapert es gewaltig

Die Grundidee ist an sich super, jedoch hapert es an der Umsetzung bei der App. Sie ist sehr fehleranfällig, sodass zum Beispiel nach meiner regelmäßigen Periode direkt einen Tag später für einen Tag hohe Fruchtbarkeit angezeigt wird. Außerdem juckt das Pflaster gewaltig.

Gut, aber ..

Habe die App bereits seit fast zwei Jahren. Fand sie sehr übersichtlich und mit dem Tracken hat alles wunderbar geklappt, so dass man einen guten Überblick über alles hat.

Seid den neuen Update allerdings bin ich etwas enttäuscht von der App.
Wenn ich für den Tag bestimmte Dinge eintrage, werden mir diese nicht mehr als Notiz angezeigt, so dass man keinen Überblick mehr hat, über das, was an dem Tag mal war. Bitte wieder ändern.
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Didn’t work

The app is horrible, it gives little to no information
The patch was even worse, I had it on for a week and it never detected ovulation. I had an LH rise and then ovulation was confirmed several days after through bbt but somehow the patch never picked it up. When I asked support they said I should have left it on because it probably would have detected it the next day, convenient, however that would have been over 48 hours after I actually ovulated and the egg would be long gone. I’m not really sure how anyone has had success with this, maybe I got a bad patch? But for $40 each I will NOT be trying it again. It also left a horrible rash and a blister. 0/10 recommend
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Patch application date not flexible

I was extremely optimistic to start and brushed off the bad reviews because I am am willing to try anything at this point in TTC. I track my LH with OPK strips and input the data in the app. The app claimed my window was March 11-14. My LH surge occurred March 11. So it never detected my ovulation because it had me apply the patch too late. I had ovulation confirmed by ultrasound March 11. So had I followed the app advice, I would not have been testing in my window, which is really sad to think might be happening to other users. To put it into perspective I ovulated on CD-14, which is really normal. I hate that the app didn’t adjust the application date and I couldn’t apply sooner and start reading it despite my OPK data. The app is not good, it doesn’t show any data and doesn’t adjust to inputted data. The patch gave me a dermatitis rash that I’m having treated now, and it was extremely uncomfortable. Until this is fixed, I cannot recommend it to anyone and will let all my patients know that it is stress inducing, uncomfortable and inaccurate.
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Maria

Enjoying the new update. I have been using femSense to track my cycle. The app makes it easy and the patch is barely noticeable for me most of the time.

Developer apps

FAQ

What does the femSense app do?

The femSense app helps you understand your menstrual cycle and fertility. It can be used to identify your fertile days for pregnancy planning or as a free cycle tracker to monitor your period, symptoms, and cycle phases. The app also offers insights into your body's patterns.

How does femSense help with pregnancy planning?

When used in 'Get pregnant' mode, femSense reliably shows you when you are ovulating and identifies your most fertile days. This allows for targeted planning to increase the chances of conception. The app works in conjunction with a smart sensor patch that measures basal body temperature 24/7.

Can I use femSense without the smart patch?

Yes, you can use the femSense app as a free cycle tracking app without the smart patch. In this mode, you can track your period, log symptoms, and view recurring patterns in the app's statistics to better understand your body and cycle.

What is the smart patch and how does it work?

The smart patch is an optional component that integrates with the femSense app. It contains a temperature-sensitive sensor that continuously measures your basal body temperature throughout the day and night. This data is then read by the app using NFC technology to reliably detect ovulation and pinpoint fertile days.

Is femSense a medical device?

No, femSense is not a medical device and does not replace consultation with a doctor. The information provided by the app is for recommendation purposes only and should not be used for medical decisions. Always seek professional medical advice before making any health-related choices.