Stardust App Alternative: Period Trackers With Cryptographic Privacy Guarantees

Privacy as Marketing vs. Privacy as Architecture

Stardust launched with explicit post-Dobbs positioning, marketing itself to users concerned about period tracker data after the 2022 Supreme Court decision. The brand emphasizes privacy. The community that formed around the app includes many users who chose it specifically for privacy reasons.

The problem is that Stardust’s privacy is a brand claim, not an architectural property. The app is cloud-based. Your data is stored on Stardust’s servers. The company has made policy commitments about how it handles that data — and those commitments may be sincere. But they can also be changed, challenged in court, or overridden by a subpoena.

A privacy policy is a document. Architecture is a physical constraint.

What Policy Cannot Protect

When data exists on a server, a court with jurisdiction can compel the company to produce it. The company’s intentions are irrelevant to this process. A company that genuinely wants to protect user data but stores it on servers cannot prevent a legally valid court order from requiring disclosure.

Stardust’s privacy marketing attracted users who were specifically worried about this risk. But the architecture they chose doesn’t eliminate the risk — it just adds a layer of stated intent between the data and potential disclosure.

How Floriva Compares

Floriva’s on-device storage model is the architectural equivalent of the privacy Stardust’s marketing promises. Your data stays on your device. We have nothing stored on our servers to subpoena, sell, or expose in a breach. If you chose Stardust because of its privacy positioning and later learned the underlying architecture is cloud-based, Floriva is the option that delivers the guarantee the marketing described.