kegg vs Period
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
kegg
This medical-grade device offers accurate fertility tracking by analyzing cervical fluid in just two minutes daily. It helps identify fertile windows for conception and provides insights into ovulation, while also offering guided pelvic floor exercises for health and recovery.
- Medical-grade fertility tracking
- Cervical fluid analysis
- Fertile window identification
- Ovulation probability insights
- Guided kegel exercises
- Pelvic floor health optimization
Read full descriptionHide full description
Meet kegg® - a medical-grade fertility tracking device that gives you accurate and personalized fertility tracking through cervical fluid in just 2 minutes a day. Clinically validated fertility monitor Constructed of medical-grade silicone, kegg uses advanced sensing technology to detect the dynamic shifts in your fertility. Track Your Key Fertility Metric Maximize your chances of pregnancy by accurately detecting fertile versus non fertile cervical mucus so you can time your efforts with precision. Daily Fertility Insights Your Fertility and Cervical Mucus Score helps you identify your most fertile days, while the ovulation probability helps you see when ovulation may occur. Guided Kegel Exercises Optimize your pelvic floor health for labor and postpartum recovery using kegg’s kegel routines. CONNECT WITH KEGG: + Web:http://www.kegg.tech/ + Facebook: @kegg.tech + Instagram: @kegg_tech + Private community: https://www.facebook.com/groups/keggcommunity/ GET HELP: If you have any questions about the kegg device or the kegg app, read our FAQ at https://kegg.tech/faq or message us at www.kegg.tech/support
Period
Track your menstrual cycle, log period dates, ovulation test results, and symptoms. Gain insights into fertility probability based on your cycle length. This app helps predict periods and monitor cycles.
- Menstrual cycle tracking
- Period logging
- Ovulation test logging
- Symptom tracking
- Fertility probability insights
- Cycle length comparison
Read full descriptionHide full description
View where you are in your cycle with the Period Tracker app. You have the option to manually log your periods, ovulation test results and keep track of your menstrual cycle symptoms. Get insights into how the probability of peak fertility varies for women with the same cycle length as you. This app is designed for use by women who want to predict their periods, track their cycles or try for a baby. It should not be used as a method of contraception.
Screenshots
Verdict
The clearest difference is rating: Period at 4.9 against kegg's 3.9. Period also leads on monetization model (free vs paid) and ratings volume (2.8K vs 144). kegg's advantage is review sentiment (75% vs 54%). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Period holds the better App Store score, 4.9 against 3.9. That said, the two scores are not equally well evidenced: Period has 2.8K ratings behind it against 144, so its average is the more settled of the two. Written reviews complicate that: 75% of kegg's written reviews are positive against 54% of Period's, so the app with the better star average is not the one people write more warmly about.
kegg ships an update every 3 weeks, Period monthly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.
| Parameter | kegg | Period |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (144 ratings) | 4.9 (2.8K ratings) — better |
| Positive reviews | 75.2% of reviews — better | 53.8% of reviews |
| Number of ratings | 144 | 2.8K — better |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 52 MB | 56 MB |
| Age rating | 12+ | 12+ |
| Developer | Lady Technologies, Inc. | SPD Development Company Ltd |
Customer experience
kegg
Period
User reviews
kegg
From 144 App Store ratingsWhat we love
- 🚀 Easy to use
- 💡 Provides insights into cycle
- 👍 Helpful community support
- 🚀 Convenient daily tracking
- 🚀 Accurate fertility predictions
Room to improve
- 🐛 Buggy app with poor navigation
- 🐛 Inconsistent fertility predictions
- 🐛 Difficult to interpret data
- 🐛 Frequent login issues
- 🐛 Notifications don't always work
Period
From 2.8K App Store ratingsWhat we love
- 👍 Accurate tracking
- 🚀 Easy to use
- 💡 Helpful for fertility tracking
Room to improve
- 🐛 Notifications not working as expected
- 🐛 Data loss after updates
- 🐛 Broken links in the app
- 💡 No option to log basal body temperature
Bugs and requests
kegg
Reported bugs
4 issues- App freezes and crashes frequently
- Syncing issues between device and app
- Fertility predictions do not align with other methods
- Constant logout prompts disrupt user experience
Requested features
4 requests- Add ability to track period and symptoms
- Improve app design and user experience
- Provide more detailed data analysis and insights
- Integrate with other fertility tracking apps
Period
Reported bugs
3 issues- Dates and data getting changed after updates
- Calendar not populating after updates
- Whole calendar getting erased after updates
Requested features
2 requests- Add option to log basal body temperature
- Improve notification customization
In-app purchases
kegg
No in-app purchases
Period
No in-app purchases
Questions
Is kegg free?
Is Period free?
Which has better reviews, kegg or Period?
Do kegg or Period have ads?
Which is updated more often, kegg or Period?
Other comparisons
