Stardust Review: Features, Pricing and Who It Suits

This Stardust review is for people who want a period diary that also talks about the moon, cards and daily “hormone” stories. This is a source-reviewed guide, not a hands-on lab test. Apple, Play and the 8 May 2026 privacy policy were captured on 13 September 2026. We did not keep a cycle in the app.

Who this Stardust review is for

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Download Stardust Period Tracker on the App Store · Get Stardust Period Tracker on Google Play

Stay if you want period dates plus a moon calendar, and you like folklore next to a symptom log. Stay if partner sharing and pregnancy-mode AR sound useful, and you will still treat forecasts as guesses.

Skip it if you want clinical-only language with no astrology. Skip it if you need contraception. Skip it if a lagged home screen will stop you logging — several Play notes from 2024 and 2026 called the app slow or blank.

For a Berlin, EU-hosted diary, read our Clue review. For Flo’s community and Anonymous Mode, see Flo review. The wider shortlist sits at best period tracker apps.

Dated features and store facts

The US App Store page we opened listed period and PMS predictions, daily insights, wearable BBT from Apple Watch or Oura, pregnancy mode with 3D and AR “baby size,” partner invites, a moon calendar, and daily cards tied to sun, moon and rising signs. Play copy matched that mix and added sleep and activity insights.

The FAQ at stardust.app says the free tier includes cycle predictions, daily insights, symptom tracking and lunar sync. Super unlocks Cyclepedia (the page claims 150-plus decoded feelings), tarot-style readings, horoscope tools and deeper partner mode. Those are manufacturer counts, not our inventory.

Both storefronts print the same medical line: Stardust should not be used as birth control or contraception, and it does not substitute for professional advice.

Stardust price and twelve-month cost

This Stardust review treats SKUs as store-specific. Several “All Access” rows have no month-or-year label. We will not invent one.

If you take the named US monthly plan at $6.99, twelve bills cost $83.88. A named $29.99 annual plan costs $29.99 for that year. Trial annuals at $24.99 and $39.99 need a live checkout to see which one you are offered.

UK monthly at £6.99 is £83.88 over twelve months. Named yearly rows start at £24.99 with a 7-day trial on the grid we saw. Cancel inside the store window if you only wanted the trial.

We did not buy Super. We cannot say which tile a new account sees first.

Privacy and the label mismatch

Store marketing says Stardust never sells or shares personal health information. Play Data Safety, captured 13 September 2026, said no data is shared with third parties. That is a developer form.

Apple’s label on the same day said purchases, identifiers and usage may be used to track you across other companies’ apps. It also listed unlinked purchase history, device ID and product interaction for third-party advertising.

The privacy policy dated 8 May 2026 says health data is stored against a random account ID and is not tied to the email used to log in. It still lists advertising partners, analytics cookies and SDKs, and vendors who need data to run hosting and ads. A health-data addendum dated 21 October 2025 says Stardust does not use health data to serve digital ads. Those sentences can both be true and still leave ad identifiers on the Apple label.

If a viral post told you there is an active sale-of-data lawsuit, the developer’s 23 April 2026 Play reply called that “spammy” and false. We did not find a docket in this capture. Absence of a docket is not a security audit.

What published studies actually measured

We searched for a named trial that scores Stardust period or ovulation error against ultrasound or serum hormones. We did not find one we could date. Empty is honest.

Older Apple reviews (including a 2022 note still featured) said an on-screen progesterone curve looked wrong after a redesign. That is one user’s graph complaint. It is not our error rate. A hormone illustration that rises on a 28-day cartoon is not your bloodwork.

NHS irregular-period advice still starts with a changed pattern, periods longer than seven days, bleeding between periods, or three missed periods. Bring a date list to a GP. Do not bring a moon phase as proof. If training pain is the issue, see exercise warning signs. For how much weekly activity guidelines actually ask for, see UK and US physical activity guidelines.

What remains unverified

This Stardust review did not measure lag, crash rate or AR baby-size error. We did not recapture a Play install band. We did not open every All Access SKU to learn its term.

We did not independently prove or disprove the 2026 data-sale rumour. We quote the developer reply and the written policy.

Cycle-length math can be ordinary. Astrology copy cannot be validated in PubMed the way a lab assay can. Do not confuse the two.

Who should skip Stardust

Skip Super if you only need a period reminder. The FAQ says the free tier is meant to stand alone. Skip the whole app if moon language will annoy you into deleting the log. A plainer long-running calendar is covered in our Period Calendar review.

This Stardust review lands here: useful when you want a stylish diary and you will ignore cards that over-explain your blood. Poor fit when you wanted a contraceptive or a clinic-grade hormone curve.