Free AI symptom checker developed by doctors
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Track your cycle with science, and a little astronomy

According to OpenAITools.app telemetry verified on 2026-11-11, Stardust (stardust.app) is an AI platform indexed under AI Healthcare generating 39.95K monthly visits with a month-over-month traffic delta of -2.99K (-7%). Its primary geographic market is United States (59% traffic share), and it operates on a Free pricing model. Top competing alternatives by monthly volume include Ubie (2.94M visits/mo), Heidi (2.02M visits/mo), Doctronic AI Doctors + Human Doctors (1.5M visits/mo).
Log and predict your menstrual cycle, with insight into the phases that shape your energy and mood across the month.
Identify your fertile window with ovulation predictions built on your own logged data rather than a generic calendar.
Track pregnancy week by week alongside your cycle data in the same app.
See how your hormones shift across the cycle and what each phase means for how you feel.
A distinctive Moon Magic feature syncs your cycle with lunar phases, framed through Stardust's astronomy layer and the Wormhole guide.
Stardust is a health-tracking app for women, available for iOS and Android. It covers the core ground you would expect — menstrual cycle tracking, ovulation prediction and pregnancy tracking — and layers on a distinctive astronomy angle that syncs your cycle with lunar phases in its Moon Magic feature.
The app is positioned as women-built and data-encrypted, with its own health and data privacy policy, and it stresses that your data is private, period. Its editorial side, The Wormhole, acts as a guide to the menstrual-moon galaxy, giving the product a strong point of view beyond raw numbers.
The website itself is primarily a download and information hub: it links to the App Store and Google Play, explains the App Features, points to Stardust Buzz for community reaction, and includes a shop and FAQ. Subscription management is handled inside the app.
Log your period and see predicted phases so you can plan workouts, work and rest around your cycle.
Use logged data and ovulation predictions to identify your fertile window when you are trying to conceive.
Follow your pregnancy week by week in the same app where you have been tracking your cycle.
Explore how hormone phases affect mood and energy, and use the Moon Magic feature to sync your cycle with lunar phases.
Side-by-side telemetry comparison of competing AI tools in the same primary category
| Rank | AI Tool | Monthly Visits | MoM Growth | Direct traffic share | Pricing | Head-to-Head |
|---|---|---|---|---|---|---|
| ● | Stardust | 39.95K | -7% | 25% direct | Free | Current |
| 1 | Ubie | 2.94M | -23.2% | 18% direct | Free | vs Ubie |
| 2 | Heidi | 2.02M | +7% | 70% direct | Freemium, Free Trial, Paid, Contact for Pricing | vs Heidi |
| 3 | Doctronic AI Doctors + Human Doctors | 1.5M | +4.3% | 19% direct | Freemium | vs Doctronic AI Doctors + Human Doctors |
| 4 | Lecturio | 1.05M | +17.8% | 44% direct | Freemium | vs Lecturio |
| 5 | Freed AI Medical Scribe | 951.17K | +4.5% | 86% direct | Free Trial, Paid, Contact for Pricing | vs Freed AI Medical Scribe |
| 6 | Carepatron | 819.8K | -4.1% | 60% direct | Freemium | vs Carepatron |
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