Does Stardust actually store data locally?

Stardust markets on privacy and local storage, but the app requires account creation, which means your identity is tied to your data on their servers. Genuine local storage means no account, no server sync, and no cloud component. Check any app's privacy policy for the data architecture section, not just the marketing language.

What should I look for to verify a period app stores data locally?

Three things: the app should work without an internet connection after setup, it should not require an email or account, and the privacy policy should explicitly state that no data is sent to company servers. If an app requires an account, your data is linked to an identity on a server somewhere.

Is Stardust safer than Flo?

Stardust has no documented enforcement history like Flo's 2021 FTC action and $59.5M settlement. But safety relative to Flo is a low bar. The structural question is whether your data reaches a server at all. If it does, company promises can change, companies can be acquired, and courts can issue subpoenas.

Is Stardust period tracker private?

Stardust markets itself as privacy-conscious and has built a community around post-Roe privacy concerns. However, Stardust is cloud-based. Your data is stored on Stardust's servers, which means it can be subpoenaed. The app's privacy protections are policy-level, not architectural.

What's the difference between Stardust and Floriva?

Both apps market privacy. The difference is architecture. Stardust stores data on cloud servers (policy says they protect it). Floriva stores data on your device (there is nothing on our servers to hand over). Architectural privacy cannot be changed by a policy update or a court order.

alternatives

Stardust Alternative: Period Trackers With Local Storage

Stardust markets itself on privacy but stores data server-side. Here are period tracker alternatives that genuinely keep your cycle data on your device.

The Post Roe Period Tracker Migration After the Supreme Court's 2022 Dobbs decision eliminated federal abortion protections and Flo's FTC enforcement history became more widely discussed, a number of users began actively looking for period trackers with stronger privacy postures. Stardust was one of several apps that gained visibility during this migration by explicitly positioning on privacy. The positioning worked. Stardust saw download growth from users specifically looking to leave Flo. Whether the app delivers on the privacy premise is a different question. The 72 Hour Privacy Collapse On June 24, 2022, the day Dobbs was decided, CEO Rachel Moranis posted a TikTok claiming Stardust was "the first period tracker to implement end to end encryption." Downloads surged from roughly 3,000/day to 200,000 on June 25. Sensor Tower reported 82% of Stardust's total 400,000+ lifetime installs came in just two days. The app hit 1 on the US App Store. Within 72 hours, the claim fell apart. TechCrunch reporters Sarah Perez and Zack Whittaker ran a network traffic analysis on June 27 and found Stardust shared users' phone numbers with Mixpanel. When pressed, Moranis described standard SSL in