iPhone Screenshots


Discover your fertile window with kegg™ — the world’s first intuitive 2-in-1 fertility tracker.

kegg measures changes in electrolyte levels of cervical fluid —the key metric to knowing your fertile window within each menstrual cycle. Shaped as a Kegel ball and smaller than an egg, kegg is a body-safe, medical device that takes the guesswork out of fertility tracking. This is fertility understood!

• "Redefining the future of fertility industry." - Fortune
• Featured in Vogue, Forbes, Fortune, IVF Babble, and more.


+ Detect your fertile window up to 7 days in advance
+ Precise, easy cervical fluid tracking
+ Early cue to your fertile window
+ Log other fertility data in the app e.g. LH test results, progesterone levels, and sexual activity
+ BONUS: Exercise your pelvic floor with kegg’s built-in vibration motor


Either in the morning or evening, connect your kegg with the mobile app and temporarily insert the ball-shaped part of kegg inside your vagina with the tail remaining outside, facing forward. You’ll feel one vibration to signal that the test has started and two vibrations when the 2-3 minute test is done..

Following the daily test, kegg will send your vaginal data to the cloud for analysis. In real-time, the device connects to a mobile app that displays test results, cyclical trends, and fertility predictions. With continuous daily use, you will gain deeper insight into your own unique fertility pattern.

As a bonus, you can use kegg in conjunction with Kegel exercising before the test starts. Doing Kegels before taking a fertility reading can also increase lubrication and circulation for easier data collection.

kegg™ is an FDA-registered medical device, suitable for women with irregular periods.


+ Cervical fluid is the key sign to knowing your fertile window and peak fertility because sperm can’t survive in the vagina unless cervical fluid is present.
+ Cervical fluid is a hydrogel that contains mucin molecules, water, and biochemical compounds. These elements make up the electrolyte structure of cervical fluid, which kegg measures using impedance technology.
+ During the test, kegg uses very low-level electrical pulses to measure how your cervical fluid affects those pulses. kegg measures those levels and displays them to you in actionable results.


kegg is a fertility tracking monitor that measures changes in electrolyte levels in vaginal fluids.
The app can only be used with the kegg device. Visit www.kegg.tech to order your kegg device today!


+ Web: http://www.kegg.tech
+ Facebook: @kegg.tech
+ Instagram: @kegg_tech
+ Private community: https://www.facebook.com/groups/keggcommunity/


If you have any questions about the kegg device or the kegg app, read our FAQ at kegg.tech/support or email us at support@kegg.tech

What’s New

Version 1.3.22

bug fixes

Ratings and Reviews

3.6 out of 5
19 Ratings

19 Ratings

Xehpa100 ,

New Kegger

New user here and I’m excited to see all the stats. I find it easy to read and like that I can put notes and it ask for certain details of daily readings. Customer service is amazing!!! Excited new user here hopefully will have a kegglet to talk about.

andrea_green_001 ,

Don’t buy this device

Ok, I hardly ever write negative reviews, but I have to here. The device & the app are absolutely useless. I wish I have read the negative reviews on the FB group before buying. First, it uses a calendar method and nothing else. I can deduct 12-14 days from my last period without paying so much money for a device and measuring myself daily... Second, as others have pointed out, the app is terrible. It doesn’t show any numbers or actually tell you anything about your graph. Although it shows high or low fertility, this is no indication of reality. I missed my fertile window because I was trusting Kegg! Once I put in my next period, the whole fertile window shifted to a completely different place. Guess what, we were trying on the wrong days 🤷🏼‍♀️. Temps are much more reliable than this guessing game. At least in my case. And let me point out that my cycles are pretty regular. Can’t imagine what this shows to people with cycles all over the place. All of the advertising around this device is so misleading, I can’t even 🤦🏼‍♀️.

Developer Response ,

Thanks Andrea for your review. First, kegg absolutely does not use the calendar method. kegg predicts the fertile window by detecting changes in the electrolyte levels in the cervical mucus, which allows it to detect the switch from estrogen to progesterone dominance that accompanies ovulation. An exception is where cycles are longer than 40 days or shorter than 21 or where due to supplements or other factors, the change can not be detected.

kegg has a 100 days money back guarantee (with some restrictions) if it doesn't work for you.

ilovejacqui ,

Great device, great app, great support

No two bodies are alike and when you have difficulty conceiving it can be overwhelming with all the information out there. Kegg is an excellent tool to have in your arsenal. Maybe you don’t get much cervical mucus, or can’t tell the differences, or have ovulation that occurs before/after the typical fertile window; kegg will help with all of these elements. The kegg support group is an excellent resource too, the moderators give lots of individualized responses and are happy to engage. The kegg app is very straightforward, and easy to use; whole process is only a few minutes out of the day. The longer you use it, the more data the app has to offer personalized insights from the data you provide. It’s a great device and well worth the small investment!

App Privacy

The developer, Lady Technologies, Inc., 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 Not Linked to You

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

  • Health & Fitness
  • Contact Info
  • Identifiers
  • Usage Data
  • Sensitive Info
  • 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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