# femSense fertility — Hormone-free Family Planning > Hormone-free fertility tracking and cycle calendar with optional smart sensor patch. (iPhone/iPad app by SteadySense GmbH.) - Source: https://appshunter.io/ios/app/femsense-fertility/id1373747509 (this page in markdown: same URL + `.md`) - Developer: [SteadySense GmbH](https://appshunter.io/developer/1373747508) - Category: Health & Fitness, Medical - Price: Free - Rating: 2.40/5 from 21 App Store ratings · 46 written reviews indexed - Age rating: 12+ - Requires: iOS 15.0 · 63 MB - Languages: American English, German (Germany) - Released: 2020-12-20 - Data updated: 2026-08-14 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/femsense-fertility/id1373747509/reviews.md ## What is femSense fertility? There for you in every situation - femSense helps you to understand your cycle and your fertility. - Planning a pregnancy: femSense reliably shows you when you are ovulating and when your fertile days are. That way, you can easily plan a pregnancy. - Free period calendar: You can also use femSense as a cycle tracker to get to know your own body better. The app always tells you which cycle phase you are in and when your next period is due. Better together: our app and our smart patch. How femSense works - The temperature method is cumbersome & old-fashioned? We don't think so. We've brought it into the 21st century and developed a smart sensor patch that measures your basal body temperature 24/7. The attendant app tells you when you're ovulating and when your fertile days are. - No patch, no problem. You can also use the femSense app as a free cycle tracking app without a patch, and without any annoying ads! In addition to your period, you can also track your symptoms and view recurring patterns in the stats. This way you will get to know your body even better and live in harmony with your cycle. It's that easy: Download the app, register, and select mode: - Want to understand your fertility and cycle better? Then choose "Fertility Awareness". - You want to have a baby? Then choose "Get pregnant". You can buy our patches directly in the app or in our online store. With the combination of the femSense app and the smart patch you can: - In cycle tracker mode, see your fertile phase and learn your daily fertility status (high fertility / low fertility). - In fertility mode, find out your 4 most fertile days and get pregnant in a targeted way. - Find out when (and if) you ovulated. What makes femSense so unique: - Our Hero, the smart patch, has an integrated temperature-sensitive sensor that continuously and all by itself records your body temperature readings at set time intervals, reliably detecting your ovulation. - Short wearing time: You wear the patch on a maximum of 7 days a month - the app tells you when. - Comfortable to wear: our patch is ultra-thin, discreet, skin-friendly (it's gentler on your skin than a conventional sensitive patch!) and medically tested. - NFC technology: you read your patch using low-radiation NFC technology. NFC stands for "Near Field Communication." You already know it from contactless payment and electronic passports. Your data is protected because the short reading distance makes it impossible to access it without permission. - Speaking of data. Privacy is a big concern for us We handle your data carefully and would NEVER sell it to third parties. Learn more about this on the femSense website under "Privacy Policy". Important: - femSense does not replace a consultation with a doctor. The information in the app is recommendations and cannot be used for medical purposes. Always seek medical advice before making medical decisions. - femSense is not (yet) an officially recognized means of contraception. - femSense is a registered trademark of SteadySense GmbH. ## Key features - Fertility tracking - Ovulation prediction - Cycle calendar - Period tracking - Symptom logging - Smart sensor patch integration - NFC data reading ## Recent user reviews (10 of 46) All indexed reviews: https://appshunter.io/ios/app/femsense-fertility/id1373747509/reviews.md ### 2/5 — Grundidee super, an der Umsetzung hapert es gewaltig *2024-07-18, version 2.2.0* 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. ### 3/5 — Gut, aber .. *2024-06-19, version 2.1.0* 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. ### 1/5 — Didn’t work *2024-03-19, version 2.1.0* 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 ### 1/5 — Patch application date not flexible *2024-03-14, version 2.1.0* 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. ### 5/5 — Maria *2024-03-13, version 2.1.0* 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. ### 1/5 — Horrible *2024-03-06, version 2.0.11* This product is horrible. It has you put in your previous cycles and my first patch it had me apply it on my peak day and the patch didn’t even sense it. (I use other devices so I know I was at peak and ovulated the next day) not sure why it wouldn’t have me apply it sooner when I put the results of my opk in the app. Makes no sense. Waste of $40!! I’m so angry! Do not buy! ### 3/5 — Ok, not great *2024-03-03, version 2.0.11* I thought that you would get a readout of your temperature measured by the patch but it doesn’t. I wish I could actually see in a graph what the patch measured. There is also no way to add your BBT measured throughout your cycle, you can add a bunch of other symptoms to improve your predictions like OPK and physical symptoms but nothing for BBT. I have used it for one cycle and will try again next cycle. The patch did say it detected my ovulation but I forgot to scan my patch until I was drinking coffee so I am not 100% sure it it just registered my higher temp from my warm drink or I did in fact have a higher BBT. Once the patch detects ovulation you can no longer scan it to confirm the higher temp. ### 1/5 — poor design- *2023-10-22, version 2.0.11* no data analysis for the user who has paid quite a lot for this patch - no proper instructions- for me it didn’t even tell me whether ovulation occurred or not - just prompts me to do a pregnancy test in 11 days which is so ridiculous- doesn’t even prompt when you can remove the patch! I regret getting 3 patches - total waste of money and time -will stick with inito ### 1/5 — poor design *2023-10-17* have been using inito in the past - gives you detailed explanation and instructions - this is waste of my hard earned money - **Developer response:** We are sorry to hear, that you are not happy with femSense. We truly value our users feedback and are commited to ensuring that every user has a positive experience. We would love to learn more about your specific concerns and see if there is anything we can do to address them. Please feel free to send us an email at customersupport@femsenseus.com (US) or support@femsense.com (EU). Your input is important to us and we are here to help resolve any issues you might have. Love – your femSense team 💕 ### 4/5 — Honest opinion *2023-10-09, version 2.0.10* I was so unsure about getting this app let alone the patch. Thankful that I did. I see a lot of negative but I think it’s different for everyone. I will say this the price in the patch is a little up there for sure especially since it’s only one patch, but for me it worked. I definitely think there could be a little more to this app for sure, like it be nice if we could see the temperatures and more data that it’s taking when we sync our phone to it to see if we ovulation. For me it wasn’t bad wearing it but it is a stick on so after a couple days it was a little uncomfortable but nothing crazy didn’t really notice it and I’d almost forget about it. Now I have pcos and used this unsure I was ovulating and just before my last day it told me I was and I couldn’t of been more happier to have that confirmed ovulation. It would be nice if it should like times an all that along with the other things I mentioned before. So if your getting it just know it doesn’t show you really anything you have to fill out the information like any other app witch to me not a problem. An wear it the full time it will tell you to take it off once you have confirmation of ovulation. I know there’s a bunch of bad reviews for me it wasn’t bad tho everyone will be different though. I think it was worth a try. ## Frequently asked questions about femSense fertility ### 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. ## Version history (last 5 releases) ### 2.3.1 — 2026-08-12 Added support for the Portuguese language. ### 2.3.0 — 2026-04-09 - We added support for unusual long cycles - Generic App improvements ### 2.2.4 — 2025-08-21 minor updates to patch application tutorial new information pop-up when large cycle variabilities are entered updated US shop link and support e-mail address bugfixes ### 2.2.3 — 2025-05-07 The activation issue with Google Pixel devices has been fixed. The app behaviour when a pregnancy end is entered has been updated. New FAQ help center ### 2.2.2 — 2025-03-12 Address change ## Apps similar to femSense fertility | App | Rating | Price | Category | | --- | --- | --- | --- | | [Natural Cycles Fertility App](https://appshunter.io/ios/app/natural-cycles-fertility-app/id765535549) | 4.8 (29,692) | Free | Health & Fitness | | [Glow Ovulation & Period App](https://appshunter.io/ios/app/glow-ovulation-and-period-app/id638021335) | 4.7 (74,412) | Free | Health & Fitness | | [Flo Cycle & Period Tracker](https://appshunter.io/ios/app/flo-cycle-and-period-tracker/id1038369065) | 4.7 (1,933,627) | Free | Health & Fitness | | [Clue Period & Cycle Tracker](https://appshunter.io/ios/app/clue-period-and-cycle-tracker/id657189652) | 4.8 (401,088) | Free | Health & Fitness | | [Premom-Ovulation Tracker, PCOS](https://appshunter.io/ios/app/premom-ovulation-tracker-pcos/id1279295922) | 4.8 (58,195) | Free | Health & Fitness | | [Cycle Tracker & Period: Cycles](https://appshunter.io/ios/app/cycle-tracker-and-period-cycles/id577187307) | 4.7 (26,568) | Free | Health & Fitness | ## More apps by SteadySense GmbH - [STEADYTEMP Smart Thermometer](https://appshunter.io/ios/app/steadytemp-smart-thermometer/id1504048457) All apps by SteadySense GmbH: https://appshunter.io/developer/1373747508 ## Related topics [fertility temperature](https://appshunter.io/ios/topics/fertility-temperature) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*