Stardust Alternatives: 6 Period Trackers to Try in 2026

Why People Look for Stardust Alternatives

Two different groups end up here. The first likes Stardust's aesthetic, the moon phases, the daily hormone-stage readout, the friend syncing, but wants more out of the app itself. Its symptom category list is lighter than Flo's or Clue's, and there's no pregnancy mode, so once your needs grow past daily logging, the app can start to feel thin.

The second group read the privacy coverage. In 2022, reporting found Stardust had shared users' phone numbers with a third-party analytics service, and that its marketing overstated its encryption as end-to-end when it wasn't. More recently, a Mozilla Foundation review published in July 2026 found the company's privacy policy had been revised twice in about seven months, each revision disclosing more advertising data sharing. Neither is a reason to panic, and Stardust has made real changes since 2022, but it's a reasonable prompt to look around.

Both are legitimate reasons to read this guide, and neither means Stardust is a bad app. It's a genuinely well-designed one with a specific strength: making cycle tracking feel like something you want to open. The question is just whether that strength is enough for what you need right now.

Stardust's Privacy Record: What Actually Happened

Here's the factual record, with dates, so you can decide for yourself what it means for you.

2022: Reporting found Stardust had shared users' phone numbers with a third-party analytics service. The same reporting found the app had marketed itself as "encrypted" in a way that implied end-to-end encryption when its actual encryption was standard, not end-to-end. Its privacy policy at the time also stated it would comply with law enforcement requests for user data whether or not legally required to, a detail that drew attention after Roe v. Wade was overturned that year.

Since 2022: Stardust removed the overstated encryption claim and dropped the "whether or not legally required" language about law enforcement cooperation. To its credit, these are real, verifiable changes, not just statements. The company says it has never actually received a law enforcement request for user data. Its Health Data Privacy Policy ties health data to a randomized ID rather than your name or contact information.

July 2026: A Mozilla Foundation review found that Stardust's privacy policy had been revised twice in roughly seven months, with each revision disclosing more device and advertising data sharing, including naming Meta's and Google's ad-measurement tools as data partners as of May 2026. The Health Data Privacy Policy itself was unchanged in that review, meaning the randomized-ID approach to health data specifically wasn't what shifted. What changed was disclosure around broader app and advertising data.

Put together: Stardust responded to real criticism with real fixes, and it also kept expanding what it discloses about ad-partner data sharing in the years since. Both things are true. Read the app's current privacy policy yourself if this is a deciding factor, since policies change and this article reflects what was published as of August 2026.

When Staying With Stardust Makes Sense

Staying is a legitimate choice, and for a lot of users it's the right one. Here's where Stardust earns a real recommendation.

• You actually open it every day. The daily hormone narrative and moon-phase framing make cycle tracking feel less like a chore than a plain calendar app. That's a real reason people stick with a tracker instead of abandoning it after a week.
• You like syncing with friends. Stardust's cycle-sharing feature is a genuine differentiator, not something most trackers offer.
• Your needs are mostly cycle-basics. If you're not trying to log detailed symptoms or plan a pregnancy, the lighter tracking depth isn't a limitation for you.
• You've read the current privacy policy and you're comfortable with it. The company has made real changes since 2022, and reasonable people land in different places on how much the 2026 disclosure findings matter to them.
• You want to keep the price low. At roughly $24.99 a year, Stardust Plus is one of the cheaper premium tiers in the category.

If most of that describes you, there's nothing here that should push you off Stardust. The rest of this guide is for everyone else.

The 6 Alternatives Compared

Here are six apps matched to different reasons for looking around, in no particular order of quality. Each profile covers features, strengths, honest limitations, and price.

For a Mainstream Tracker With a Strong Privacy Record: Clue

Best if you want: Cycle tracking from a company with a clean privacy record across more than a decade. Clue is genuinely the privacy-conscious mainstream pick.

Key Features

• Cycle predictions built from your own logged history
• Symptom tracking across 30+ categories
• Science-backed content reviewed by researchers
• Gender-neutral design
• Pregnancy mode and deeper analysis in Clue Plus

Strengths

• Berlin-based and covered by EU GDPR privacy law, with a stated commitment not to share data with US authorities
• A clean privacy record across more than a decade
• Cross-platform (iOS and Android)
• Deeper symptom categories than Stardust's daily-readout model

Limitations

• The design is more clinical than Stardust's, with no moon-phase or lifestyle content
• Pregnancy mode and some insights require Clue Plus
• No friend-syncing feature like Stardust's
• Requires an account, so there's no local-only option

Who Should Choose This

• Privacy is your main reason for looking around
• You want deeper symptom logging than Stardust's daily readouts cover
• You can live without the daily hormone narrative

Pricing: Free, Clue Plus ~$39.99/year.

Download: Available on iOS and Android

---

For the Deepest Feature Set and Biggest Community: Flo

Best if you want: The most-used period tracker in the category, with the widest symptom list, free pregnancy mode, and community discussions.

Key Features

• Cycle tracking with AI-powered predictions
• Wide symptom tracking, deeper than Stardust's daily readouts
• Thousands of health articles reviewed by medical professionals
• Secret Chats: anonymous community discussions
• Pregnancy mode included free, with week-by-week tracking

Strengths

• The largest community of any tracker in the category, useful if you want to compare notes with other users
• An extensive, medically reviewed content library
• Free pregnancy mode, where several alternatives here have none
• Cross-platform (iOS and Android)

Limitations

• Flo settled with the FTC in 2021 over sharing health data with Facebook and Google without proper consent. A related class action against Flo, Google, and Flurry received preliminary court approval in April 2026 for a combined $59.5 million settlement, with a final approval hearing set for October 2026, and a jury separately found Meta liable in August 2025 for its role in receiving that data. Flo has since added Anonymous Mode and open-sourced it
• Free users see ads, and the AI Health Assistant sits behind Flo Premium
• No moon-phase or lifestyle content like Stardust's
• No nutrition, habit, or sleep tracking

Who Should Choose This

• Feature depth and community size matter more to you than daily design
• You want a free pregnancy mode
• You're comfortable with Flo's privacy history, especially since Anonymous Mode addresses the core worry

Pricing: Free (with ads), Flo Premium ~$59.99/year.

Download: Available on iOS and Android

For a deeper look at Flo's privacy history and a broader alternatives list, see our Flo Alternatives guide.

---

For a Free Option Already on Your iPhone: Apple Health Cycle Tracking

Best if you want: Basic period tracking with no new app, no new account, and no subscription. It's built into every iPhone.

Key Features

• Period logging with predictions and fertile window estimates
• A core symptom list (cramps, mood, headache, and more)
• Cycle deviation notifications that flag irregular patterns
• Retrospective ovulation estimates using wrist temperature from Apple Watch Series 8 and later

Strengths

• Completely free with nothing to install
• Strong default privacy: data is stored on your device, and iCloud copies are end-to-end encrypted when two-factor authentication is on
• If you later pick a dedicated app, your Apple Health logs come with you

Limitations

• No moon-phase content, community, or content library
• Symptom list is shorter than dedicated trackers
• No pregnancy mode
• iPhone only

Who Should Choose This

• You mainly used Stardust to know when your period is coming, not for the daily content
• You want to pause app subscriptions and accounts entirely for a while
• You own an Apple Watch and want temperature-based estimates without another app

Pricing: Free, built into iOS.

---

For Local-Only Storage From a Nonprofit: Euki

Best if you want: Tracking where your data physically never leaves your phone. Euki is run by the nonprofit Women Help Women and asks for no account at all.

Key Features

• Period and symptom tracking stored only on your device
• No account, email, or name required to use it
• PIN lock for the app itself
• Plain-language sexual and reproductive health information built in

Strengths

• There's no server-side copy of your data to share, sell, or subpoena, because there's no server-side copy at all
• Scored a perfect 10 out of 10 in Mozilla Foundation's 2026 privacy review of period trackers
• Nonprofit-run, so there's no ad model behind it
• Completely free on iOS and Android

Limitations

• No moon-phase content, friend syncing, or daily narrative like Stardust's
• Predictions are simpler than the big apps, which is a deliberate design choice rather than a flaw
• No cloud backup, so a lost or broken phone means lost data

Who Should Choose This

• Local-only storage is your top requirement
• You want a tool from a nonprofit rather than a company
• You're fine trading design and daily content for privacy. Euki delivers exactly what it promises

Pricing: Free, no in-app purchases. Available on the App Store and Google Play.

---

For Open-Source Tracking: Drip

Best if you want: A tracker whose code anyone can read. Drip is open source, stores everything locally, and never asks who you are.

Key Features

• Period tracking plus symptothermal logging (temperature and other fertility signs you enter yourself)
• Data stored in an encrypted database on your device
• No account required
• CSV export built in, so your data is portable from day one
• Open-source code, published for anyone to inspect

Strengths

• You don't have to trust a privacy policy, because you (or anyone technical) can verify what the app does
• Local-only by design, with no server collecting anything
• Built-in export from day one, which is more than Stardust currently offers

Limitations

• No moon-phase or lifestyle content like Stardust's
• Everything is manual entry, with no wearable sync
• Fewer features and simpler predictions than mainstream trackers, by design

Who Should Choose This

• Open source is how you decide what software to trust
• You already take your temperature and want somewhere honest to log it
• You want maximum privacy and minimum app. Like Euki, Drip is excellent at exactly what it promises

Pricing: Free, no in-app purchases. Available on the App Store and Google Play.

---

For Cycle, Mood, Sleep, and Nutrition in One App

Best if you want: Your cycle tracked next to your mood, sleep, fitness, and nutrition, with patterns drawn from your own data instead of a daily lunar narrative. This one is our app, Go Go Gaia, so factor that in as you read.

Key Features

• Cycle predictions and symptom tracking alongside mood, sleep, fitness, and nutrition logs
• Correlation insights from your own data, like "cramps run worse on short-sleep days"
• Wearable data pulled in automatically via Apple Health (Apple Watch, Oura, Garmin, WHOOP)
• Pregnancy mode, with data that carries across life stages
• Doctor-ready data export

Strengths

• The cycle sits in the same record as everything that affects it, so patterns can show up that a cycle-only tracker doesn't have the data for
• No ads, no data selling
• Built-in data export, unlike Stardust's current setup

Limitations

• No moon-phase content, friend syncing, or daily narrative like Stardust's
• iOS only, with no Android version
• Newer app with a much smaller community than Flo or Stardust
• Some advanced features require premium

Who Should Choose This

• You kept wishing Stardust could see your sleep, food, or workout data next to your cycle
• You wear an Apple Watch, Oura, Garmin, or WHOOP
• Deeper symptom logging matters more to you than daily lifestyle content

Pricing: Free (most features), Premium $9.99/month or $49.99/year for full AI insights.

Download: Available on iOS App Store

---

Feature Comparison Table

Here's how Stardust and the six alternatives compare on the things people switching most often ask about. A ✅ means included, ⚠️ means partial or worth double-checking, 🔒 means premium-only, and ❌ means not available.

---

How to Move Your Data Off Stardust

If you've decided to switch, do it in this order: get your data out, set up the new app, then delete. Stardust doesn't publish a self-serve export tool in its settings, so plan for the request to take a little longer than an instant download. Here's the practical sequence.

1. Email support to request your data. Contact [email protected] and ask for a copy of your logged history before you delete anything. There's no confirmed in-app export button as of this writing, so email is the reliable path.
2. Write down your key dates in the meantime. While you wait on the export, record your last several period start dates and any patterns you want to keep. That's a backup you control even if the formal request takes time.
3. Set up the new app before deleting. Enter your last 2 or 3 period start dates by hand. That gives any tracker a working baseline immediately, and most need about 2 cycles of fresh logging to calibrate fully.
4. Delete your account when you're ready. In the app, go to the Alien tab, tap the purple cog icon for settings, scroll down to Delete my account, and confirm. If you pay for Stardust Plus through the App Store or Google Play, deleting your account doesn't cancel the billing, so cancel that separately in your phone's subscription settings.

Be honest with yourself about what you'll miss. You lose the daily moon-phase content, which no app here replaces exactly. You lose friend syncing if you used it. And your new app starts with a thin history, so predictions take a couple of cycles to settle in. None of that is a reason to stay if you want to go. It's just better to know before you delete than after.

Frequently Asked Questions

What apps are like Stardust?

It depends on what you liked about Stardust. Clue is the closest match for a mainstream tracker with a strong privacy record and science-backed content, though its design is plainer. Flo has deeper symptom tracking, a large community, and free pregnancy mode. Apple Health covers basic logging for free on iPhone with strong default privacy. Euki and Drip keep everything local to your phone with no account. Go Go Gaia tracks your cycle alongside mood, sleep, and nutrition. None of them fully replicate Stardust's daily moon-phase and hormone-narrative content, since that's a distinctive feature rather than a category standard.

Is Stardust safe to use?

Stardust has made real changes since 2022, when reporting found it shared phone numbers with a third-party analytics service and used language overstating its encryption as end-to-end. It removed both the overstated encryption claim and law-enforcement language that drew criticism after Roe v. Wade was overturned. A Mozilla Foundation review published in July 2026 found its privacy policy had been revised twice in about seven months, each revision disclosing more ad-partner data sharing, including naming Meta's and Google's ad-measurement tools as of May 2026. Its separate Health Data Privacy Policy still ties health data to a randomized ID rather than your name. Whether that's safe enough for you depends on reading the current policy yourself and deciding what you're comfortable with.

How do I export my data from Stardust?

Stardust doesn't publish a self-serve export feature in its settings. The most reliable path is to email [email protected] and request a copy of your data before you delete your account. In the meantime, write down your last several period start dates and any patterns you want to keep, since that's a backup even if the formal export takes time.

Is Clue or Flo more similar to Stardust?

Neither replicates Stardust's daily moon-phase and hormone-narrative content, which is unique to Stardust. Clue is closer on privacy: it's Berlin-based, covered by GDPR, and has a clean privacy record. Flo is closer on daily engagement and community, with a much larger user base and free pregnancy mode, alongside its own documented privacy history. If Stardust's daily-ritual feel is what you'll miss most, neither one replaces that exactly.

Which period trackers keep data only on your phone, unlike Stardust?

Euki and Drip both store data locally on your device with no account required, unlike Stardust, which requires an account and stores data in the cloud. Euki is run by a nonprofit and scored a perfect 10 out of 10 in Mozilla Foundation's 2026 privacy review of period trackers. Drip is open source, so its code is public for anyone to inspect. Apple Health is close too: data lives on your device, with end-to-end encrypted iCloud copies when two-factor authentication is on. The trade-off is no cloud backup and no cross-device sync.

Will I lose my Stardust history if I switch?

Your logs won't transfer automatically to a new app, so request an export from Stardust first if you want to keep your history. In the new app, enter your last few period start dates by hand to give predictions a head start. Most trackers need about 2 cycles of fresh logging to calibrate to you.

Final Thoughts

Stardust does a genuinely good job of making cycle tracking feel like something you want to open, and its 2022 privacy fixes were real, credit-worthy changes. If the daily ritual is why you're there and you've read the current privacy policy, staying is a fine answer.

If you're moving, match the app to your actual reason. Want the strongest mainstream privacy record? Clue is the natural landing spot. Want the deepest feature set and free pregnancy mode? Flo. Want to simplify to the basics for free? Apple Health is already on your phone. Want your data to never leave your device? Euki and Drip do exactly that, each in its own way. And if your reason for restlessness was wanting the cycle connected to sleep, mood, and food, that's the gap Go Go Gaia was built for.

Still deciding? Pick one and log for 2 cycles. That's enough to know if it fits, and you can always switch back.