Stardust is a free period, ovulation, and pregnancy tracker that helps you understand your period, hormones, and every phase of your menstrual cycle. We blend science, ancient wisdom, astronomy, and AI to make period tracking feel simple, intuitive, and meaningful. Track your period, log symptoms, follow hormonal changes, and watch your cycle unfold day by day. Stardust is the cycle tracker that turns daily period tracking into real self-understanding.
PERIOD TRACKER & CYCLE TRACKER
Decode your period and every phase of your menstrual cycle with a period tracker built to feel intuitive.
- Predict your next period and spot PMS patterns before they start
- Get personal daily insights based on your menstrual cycle and hormone patterns
- See predictions for your period, PMS, cravings, moods, and fertility
- Get enhanced cycle tracking insights using your sleep and activity data
OVULATION TRACKER & TRYING TO CONCEIVE
On your TTC journey, use Stardust as your ovulation tracker to predict your fertile window and understand your cycle on a deeper level.
- Get ovulation forecasts and fertility awareness to plan pregnancy
- Connect wearables like Apple Watch and Oura Ring to track your Basal Body Temperature, or log it manually
- Follow how your hormones shift across your menstrual cycle, day by day
PREGNANCY TRACKER
Pregnancy Mode is Stardust's week-by-week pregnancy tracker. Switch it on to follow your full hormonal journey through pregnancy.
- See weekly baby growth, with 3D and AR to view your baby's size right in your belly
- Get daily affirmations and symptom tracking throughout pregnancy
- Read weekly insights on health, exercise, nutrition, and ancient wisdom
- Explore hormone and moon-based insights with zodiac sign matchups between you and your baby
SYNC YOUR CYCLE WITH THE MOON
Stardust goes beyond a standard period tracker to connect your menstrual cycle to the cosmos.
- Use tools for cycle syncing and aligning your menstrual cycle with lunar phases
- Explore a moon calendar and zodiac insights with symbolism and folklore mapped to your cycle
- Pull a daily card and get readings tuned to your moon, sun, and rising sign, and cycle phase
TRACK YOUR CYCLE TOGETHER
Invite partners or close friends to stay in sync with your period, TTC journey, or pregnancy.
WHO STARDUST IS FOR
Stardust is for anyone tracking a period, predicting ovulation on a TTC journey, tracking a pregnancy week by week, following their symptoms and hormones, or wanting a closer connection between their cycle and the moon.
PRIVACY AT ITS CORE
Founded and led by women, Stardust is a period tracker built with privacy at its core. Your cycle data and menstrual cycle history are protected. We never sell or share your personal health information.
PRIVACY POLICY & TERMS OF SERVICE
https://stardust.app/privacy-policy.html
https://stardust.app/terms-of-use.html
CONNECT WITH US
Web – stardust.app
Instagram – @stardust
TikTok – @stardust.app
Note: Stardust should not be used as birth control or contraception. The app does not substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider.
Having technical issues or questions about your cycle? Email support@stardust.app.
Update: the hormone graph is BACK! …but it’s wrong? For example, the graph shows progesterone rising and rising all the way until day 1, and then not starting to fall until day 3-4. On a 28 day cycle, your graph previously showed that progesterone peaks at day 21 and then falls heading into day 1. The graph also has an incorrect count on the number of days until my next cycle, even though I set the number in my profile post-update when my historical data went adios. I have PMDD, and the #1 thing that set this app above any other was the graph showing me what my hormone levels (likely) are every day of my cycle. Being able to see when my progesterone and estrogen are rising and falling at a glance has been BEYOND helpful for my sanity. I can’t find this feature anywhere on the new update, and I also can’t tell at a glance on the Home Screen when I should ovulate or start my next period. PLEASE PLEASE PLEASE bring it back! I’m so perplexed by the design decisions that went into this major overhaul. I don’t care about tracking additional finite symptoms if I can’t compare them to my hormone levels for different days of my cycle. I also wish I had received some type of warning that they’d be enforcing new logins and wiping all of our historical data…I just lost 2+ years of tracking symptoms and dates with the new update. Much less important: While the new design style is fine, the old one was SO cute and felt much more hip.
Can’t live without it!
BlackCat_22
I have never understood myself as well as I do now.. and this app knows me better than I know myself! The tips that it sends me are insanely true to reality in a helpful way. For example, I was out of chocolate the other day and my app sent me one word “Nutella,” and I was like, “wow, that actually totally solves all my problems.” And one day it was like “fight the urge to tell everyone to hurry up today” and I felt so much more in control of my impatience, knowing that it was my hormones at work…. And I HAD felt so much more impatient on that particular day! This app has been instrumental and fundament I have never understood myself as well as I do now.. and this app knows me better than I know myself! The tips that it sends me are insanely true to reality in a helpful way. For example, I was out of chocolate the other day and my app sent me one word “Nutella,” and I was like, “wow, that actually totally solves all my problems.” And one day it was like “fight the urge to tell everyone to hurry up today” I -HAD- been feeling so much more impatient than usual on that particular day! And I felt so much more in control of my impatience, knowing that it was my hormones at work…. This app has been instrumental and I genuinely don’t think I could live without it anymore. Not to mention that it’s super cute! The color palette, the graphics, the visual illustrations that depict what my specific hormones are doing one which specific day of my cycle?! This app is next level good!
Best tracking app ever
RexiLexie
I absolutely loveee Stardust they do an amazing job of tracking not just my period but all of my phases they protect my data and really help me feel like I’m not crazy by explaining in detail hormonal changes and how they affect my body and why I’m feeling the way I do which gives me the validation and control I need over my own body their free version is amazing and premium is not overpriced I’ve never felt so respected. I had Flo for around 4 years and got Stardust this year after really wanting to be able to track all my phases and they did not disappoint a billion times better than Flo the only things that Flo had that I did like that Stardust doesn’t offer is the period community chat basically is what I’ll call I enjoyed that at times on Flo but Stardust takes my health seriously and isn’t just trying to take my money without teaching me anything about my body like Flo does for Flo every little thing other than when your period is coming you’d have to pay an arm and a leg for so unreasonable! Plus I had a small problem (more like a user error 😅) with Stardust and I reached out them they responded almost immediately give me all the answers to my questions and telling me what to do (like sending them a screen recording) if I kept struggling so they could further help me it was amazing customer service I loveee this app couldn’t recommend it more thank you Stardust!!!
Developer Response
Hi there!Yay! So happy to hear you're loving SO much of the app and it's been supportive to you and your cycles. About the period community chat, we will pass this feedback on to our team as feature request :)Thanks for leaving such a detailed and thoughtful review!All the best,The Stardust Team
New Favorite Period App
espresso froggo
I absolutely love this app! I finally found something simple that both helps my track my cycle and see why I feel the way I do at different points of my cycle. This is the perfect blend of informative and fun. Unfortunately, the app is definitely a bit glitchy. I would love to be able to add friends and see each other’s cycles, but the add friends feature doesn’t work at all! Also occasionally certain buttons stop working, preventing me from leaving the current screen.In terms of things I would like to see, I just shared the app with my trans brother (we both appreciate the lack of gendered language 💛) and while the hormone cycle tracking is still helpful information for him, it would be nice if there were options, maybe under birth control? for trans folk to log their hormone supplements as well, and hopefully a change in the chart hormone levels for them as well? just an idea. I’d also love to be able to change calendar views to show traits I’ve logged over time. However, the simplicity of this app is part of what makes it so convenient, and in no world would I want it to become so flooded with features I don’t know where to start, or that I have to buy access to the features I actually need (like some other apps on the market 🪶)TL;DR The app is simple, fun, and useful. There are a few bugs, as well as a few places that could use some development, but overall probably the most best period tracker I’ve used yet.
Developer Response
Hello! Thank you so much for this thoughtful review - we really appreciate it and it's so helpful to hear :) Your feedback has been shared with the team as they continue to work on new app developments and improvements. The friend syncing feature should have a bug fix update coming soon so stay tuned. If you have any further questions or suggestions, we would love to hear from you at support@stardust.app. All the best, The Stardust Team
Just a few minor updates and intergalactic tune-ups. If Stardust is helping you decode the mysteries of your cycle, leave us a rating and review—we love compliments.
Version 3.9.2
The developer, Stardust App LLC (New York), 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Purchases
Identifiers
Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Health & Fitness
Purchases
Identifiers
Usage Data
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More