Stardust Alternatives: 6 Period Trackers to Try in 2026

Why do people look for Stardust alternatives?

Two different groups end up here. The first likes Stardust's aesthetic, the moon phases, the zodiac insights, the friend syncing, but wants something different out of the app itself. Its symptom coverage is lighter than Flo's or Clue's, so once your needs grow past daily logging, the app can start to feel thin. (It does include a week-by-week pregnancy tracker, per its listing.)

The second group read the privacy coverage. In 2022, TechCrunch reported Stardust shared users' phone numbers with a third-party analytics service (Mixpanel) and described its encryption as end-to-end when it wasn't clearly so. Mozilla's July 2026 review scored Stardust 2 out of 10 and said its main privacy policy had been revised twice in about seven months, each time disclosing more device and advertising data. That's a reasonable prompt to look around, and it doesn't mean Stardust is a bad app. It's a distinctive one with a specific strength: making cycle tracking feel like something you want to open.

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.

What is Stardust's privacy record?

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

June 2022: TechCrunch found Stardust sent users' phone numbers to Mixpanel, a third-party analytics service, when they logged in by phone number, and saw no health data sent to Mixpanel in its traffic analysis. It also reported that the founder's description of the app's encryption (standard in-transit and at-rest encryption) didn't clearly amount to end-to-end encryption. Separately, Motherboard reported that Stardust's privacy policy said it could disclose user information to law enforcement "whether or not legally required."

After the reporting: Stardust quietly removed its end-to-end encryption references from its privacy policy after TechCrunch asked questions, and changed the law-enforcement wording to "when legally required" after Motherboard asked for comment. Stardust's founder also told TechCrunch that personally identifiable information was no longer sent to Mixpanel.

July 2026: As reported by PPC Land, Mozilla scored Stardust 2 out of 10. Mozilla's testers found the app started sending data to third-party tracking services as soon as it opened, including logged symptoms with a persistent user ID to RudderStack, and device and usage data to AppsFlyer and Facebook. The main privacy policy had been revised twice in roughly seven months, and as of May 2026 names Meta's and Google's ad-measurement tools as recipients of activity data. The separate Health Data Privacy Policy hadn't changed since October 2025. Stardust said RudderStack gets no information that can identify the user.

Put together: Stardust changed some wording after the 2022 reporting, and in 2026 an independent review scored its data practices low. Both are on the record. Read the app's current privacy policy yourself if this is a deciding factor, since policies change and this article reflects sources as of October 9, 2026.

When does staying with Stardust make 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. Reasonable people land in different places on how much the 2022 reporting and the 2026 review matter to them.
• You want to keep the price low. Stardust's App Store listing shows several paid plans, including monthly and annual options (as of October 2026), so check what each costs before assuming it's the cheaper choice.

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 that scored well on privacy: Clue

Best if you want: Cycle tracking from a Berlin-based company that scored 8/10 in Mozilla's July 2026 review. Clue is a privacy-minded mainstream pick.

Key Features

• Cycle predictions built from your own logged history
• Symptom tracking across 200+ symptoms and experiences, per the listing
• 400+ educational articles, per the listing
• Modes for period tracking, trying to conceive, pregnancy and perimenopause
• A pregnancy mode, plus a Clue Plus subscription

Strengths

• Berlin-based (the seller is BioWink GmbH)
• Scored 8/10 in Mozilla's July 2026 review: internal analytics stayed in-house and consent switches stay editable, though outside services could still tell a device was running Clue
• Cross-platform (iOS and Android)
• More symptom depth than Stardust's daily-readout model

Limitations

• The design is more clinical than Stardust's, with no moon-phase or lifestyle content
• Some features sit behind Clue Plus
• No friend-syncing feature like Stardust's
• Not a local-only app; read its privacy policy for what's stored

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 to download; Clue Plus is a paid subscription, with a $39.99 yearly option on its App Store listing (as of October 2026).

Download: Available on iOS and Android

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For broad tracking and a very large user base: Flo

Best if you want: A widely used period tracker with symptom, pregnancy and perimenopause tracking, and about 2 million App Store ratings per its listing (as of October 2026).

Key Features

• Cycle tracking with ovulation and fertile-window predictions
• 70+ symptoms and moods tracked, per the listing
• Daily insights and expert videos in Premium
• Secret Chats (anonymous community discussions), listed as a Premium feature
• A pregnancy mode with weekly development updates

Strengths

• Secret Chats for talking with other users (Premium)
• Daily insights and expert videos in Premium
• A pregnancy mode, as in Stardust and Clue
• Cross-platform (iOS and Android)

Limitations

• Flo settled with the FTC in 2021 over sharing health data with marketing and analytics firms including Facebook and Google. 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 on October 29, 2026, and a jury separately found Meta liable in August 2025. Flo has since added Anonymous Mode, and Mozilla's July 2026 review scored Flo 7 out of 10.
• The Health Assistant, Secret Chats and daily insights sit behind Flo Premium
• No moon-phase or lifestyle content like Stardust's
• No nutrition or habit tracking

Who Should Choose This

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

Pricing: Free to download; Flo Premium is a paid subscription. Its App Store listing shows several price options without labeling monthly or annual, so check the current price in the app (as of October 2026).

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.

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

Best if you want: Basic period tracking with no new app to install, on iPhone (Apple's Cycle Tracking guide).

Key Features

• Period logging with predictions and a fertile-window estimate (Apple)
• Logging for symptoms, spotting and basal body temperature
• Cycle deviation notifications that flag irregular patterns
• Retrospective ovulation estimates using wrist temperature from Apple Watch Series 8 or later and Ultra models (Apple)

Strengths

• Built into the Health app, with nothing separate to install
• Your logs live in the Health app on your iPhone; check your iCloud settings for what syncs
• If you later pick a dedicated app, your Apple Health logs come with you

Limitations

• No moon-phase content or daily narrative
• Fewer extras than dedicated trackers, with no moon-phase content, community or content library of its own
• Apple says Cycle Tracking should not be used as a form of birth control
• 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.

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For local-only storage: Euki

Best if you want: Tracking where your data stays on your phone. Euki's App Store listing says data is "stored locally (on your device) and nowhere else" and that you don't need an account, email or phone number.

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

• Per its listing, data is kept only on your device, so there's no server-side copy to share or subpoena
• Scored 10 out of 10 in Mozilla's July 2026 review of six period trackers, the top score
• Described on its listing as a non-profit, open source project
• Free, with no in-app purchases listed (App Store, as of October 2026)

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; the App Store listing shows no in-app purchases (as of October 2026).

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For Open-Source Tracking: Drip

Best if you want: A tracker whose code anyone can read. Drip is an open-source, non-commercial tracker that, per its F-Droid listing, leaves your data on your phone.

Key Features

• Period tracking plus symptothermal logging (temperature and other fertility signs you enter yourself)
• Data stays on your phone, with password protection (per its listing)
• Imports, exports and password-protects your data
• Import and export built in, so your data is portable
• Open-source code (GPL-3.0), 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, per its listing
• Import and export are built in

Limitations

• No moon-phase or lifestyle content like Stardust's
• Everything is manual entry
• Fewer extras 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 and non-commercial. The Android build is distributed through F-Droid; check for an iOS version before counting on one.

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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, Veya, 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

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

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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.

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How do you 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's App Store listing doesn't mention a self-serve export, so check the app's settings and contact Stardust support if you don't see one. Here's the practical sequence.

1. Look for an export, or ask support. Check the app's settings for an export option; if there isn't one, contact Stardust support and ask for a copy of your logged history before you delete anything.
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's settings, find the delete-account option and confirm. If you pay for a Stardust plan through the App Store or Google Play, deleting your account may not cancel the billing, so check and 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 a mainstream tracker that scored 8/10 in Mozilla's July 2026 review, though its design is plainer. Flo has broader symptom tracking, a very large user base and a pregnancy mode. Apple Health covers basic logging on iPhone. Euki and Drip keep data local to your phone. Veya tracks your cycle alongside mood, sleep, and nutrition. None of them replicates Stardust's moon-phase and hormone-narrative content, since that's a distinctive feature rather than a category standard.

Is Stardust safe to use?

That's a judgment call, so here's the record. In 2022, TechCrunch reported Stardust shared users' phone numbers with the analytics service Mixpanel and described its encryption as end-to-end when it wasn't clearly so; Stardust later removed those encryption references and changed its law-enforcement wording. In July 2026, Mozilla scored Stardust 2 out of 10, citing data sent to third-party trackers and a main privacy policy revised twice in about seven months. Stardust said RudderStack gets no information that can identify the user. Read the current policy and decide what you're comfortable with.

How do I export my data from Stardust?

Stardust's App Store listing doesn't mention an export feature. Check the app's settings first, and if you don't see one, contact Stardust support 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.

Is Clue or Flo more similar to Stardust?

Neither replicates Stardust's moon-phase and hormone-narrative content. Clue is closer on privacy: it's Berlin-based and scored 8/10 in Mozilla's July 2026 review, against 7/10 for Flo. Flo is closer on engagement, with a very large user base, a pregnancy mode and Premium-only Secret Chats, 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 describe local storage: Euki's listing says data is stored on your device and nowhere else, and Drip's F-Droid listing says it leaves your data on your phone. Euki scored 10 out of 10 in Mozilla's July 2026 review. Drip is open source, so its code is public for anyone to inspect. Apple Health keeps your logs in the Health app on your iPhone. The trade-off with local-only apps is no cloud backup, so a lost phone can mean lost data.

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. 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 a mainstream tracker that scored well on privacy? Clue. Want broad tracking and a very large user base? Flo. Want to simplify to the basics? Apple Health is already on your phone. Want your data to stay on your device? Euki and Drip describe 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 Veya 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.

If TTC-focused features are what you're actually after rather than a Stardust replacement, our Glow alternatives roundup covers the same ground for people comparing conception-focused apps.