We do not and will not sell your data. Period.

Stardust is an astrological period tracker owned and operated by a team of three women based in New York City. Given the current political climate, we have taken rigorous measures to protect users, especially those in states where abortion is being criminalized. We believe all period trackers should stringently protect the privacy of users—and be transparent about exactly how they do so.

Here is our Privacy Policy:

Effective October 19th, 2022

We will not sell your data. Full stop. This includes everything from email address to pregnancy status to location. Instead of selling data, which is how some period trackers earn money, we will one day charge for paid features within the app. We believe this is a healthy way to make sure our incentives remain aligned with those of our users.

Unlike most of our competitors, we have never sold data in the past and never will. It is neither our business model nor our philosophy to do so.

You can delete your data at any time. Your data, your choice. To erase your data, simply hit the delete button within your profile. Within minutes your data will be gone permanently.

We give you choices for how you log in. You can log in with Apple, Google, email, or phone number. We do not share any data beyond the app name with these partners.

We use vetted third parties to help us achieve our mission.

Here’s what to know.

  1. Mixpanel: We use Mixpanel to help with user analytics, so we can make better product decisions. For example, is anyone actually using this new button we designed or should we get rid of it? In this case (and all cases), we do not know who is actually tapping the button, because we save personal identifiable information in a different place from all other data. We do not save IP-addresses and we do not send any personal identifiable information to Mixpanel. All user sessions in Stardust are 100% anonymous.
  2. Rownd: We use Rownd for authentication. They are a privacy-focused authentication company. They do not sell any data, ever.
  3. Firebase: We use Firebase for crash tracking. It does not track any personal data.
  4. AWS: Our database and servers run through AWS (Amazon) services. User period data is stored on these databases anonymously. We do not know who any of the data belongs to because it is stored separately and anonymously from your personal identifiable login information.
  5. Shake.io: We use Shake for bug and crash reporting. If you shake your phone a dialog will pop up and you can tell us about a bug you’ve encountered. Please do it—it makes the app better! No personal identifiable information is shared with Shake.
  6. Pushwoosh: We use Pushwoosh for sending push notifications. No personal identifiable information is shared with Pushwoosh.

How we use your data.

Here’s exactly what we use and how we use it.

  1. Email/phone number: We use this info for login and to stay in touch with you for product updates and offers. This info is stored with Rownd, a privacy-focused authentication platform.
  2. Birth date: We use this to look at your astrological chart for natal moon phase and sign.
  3. Name: We ask you to enter your name to personalize the app experience. It doesn’t have to be your actual name! You can use any username you’d like.
  4. Period data: We look at your historical period data to predict future patterns and combine this data with your astrological chart to yield insights.
  5. Device data: We collect device data— like which version of phone or iOS you’ve got—in order to help with bugs and user experience.
  6. Country data: We can see what country’s app store you downloaded the app from.
  7. Location data: We only get “time zone” data to help with lunar position.
  8. IP Address: WE DO NOT COLLECT IT.

What happens if law enforcement sends us a subpoena for your data: We cannot prevent the government from issuing a subpoena. However, in such a case we would not be able to produce your period data because we cannot connect it to your login information. We do not know which data set belongs to which person.

If law enforcement obtains your phone and forces you to unlock it through biometrics, we cannot protect you yet. We are building a way to lock the app with a PIN and this will be ready in the coming months. If you live in a place where you are especially vulnerable, we recommend you track your period in a paper journal and store it in a secure place.

This Privacy Policy explains how Stardust App LLC. (“Company” or “we” or “us”) collects, stores, uses, transfers and discloses Personal Data from our users (“you”) in connection with the Stardust ® mobile application, stardust.app website (“Website”), and related services (collectively, the “App”). We reserve the right to and may change this Privacy Policy from time to time. If we make any material changes, we will notify you by email (sent to the email address specified when you register), through the App, or by presenting you with a new version of this Privacy Policy for you to accept, if we, for example, add new processing activities or collect some additional Personal Data from you. Your continued use of the App after the effective date of an updated version of the Privacy Policy will indicate your acceptance of the Privacy Policy as modified. In some cases, you will have to explicitly accept changes to Privacy Policy to continue using the App. We encourage you to periodically review our Website and the App for the latest information on our data privacy practices. If you do not accept the terms of the Privacy Policy, we ask that you do not use the App. Please exit the App immediately if you do not agree to the terms of this Privacy Policy.

A special note: Your privacy is of the utmost importance to us. We are using Rownd Inc. (“Rownd”), a third party privacy-focused authentication platform, to manage the process by which our users login to the App. (Rownd’s privacy policy can be found here: https://rownd.io/privacy-policy.) Your login information is encrypted by Rownd and, when you login to the App, the Company does not obtain or otherwise have access to your email address or phone number or any other information about you or your device that is capable of identifying you “PII”). As a result, unless you otherwise associate any of your PII within the App (for instance, by using your name as your username) you, none of your health data from the App––menstrual cycle dates, symptoms related to your menstrual cycle, and other information about your health and activities (collectively "Health Data," and together with your PII, your "Personal Data")–can be connected back to you. Only you have the unique encryption key and only you can use that key to link your PII and your Health Data.

Personal data and information we collect from you

  1. How we use your information
  2. Your rights
  3. Retention of your personal data
  4. Personal data you elect to share with third parties
  5. Security
  6. Third party links
  7. Privacy of payments
  8. Information Applicable to EU Users
  9. Contact us

1. Personal data and information we collect from you

Personal data you provide to us

When you sign up to use the App, Rownd may collect PII about you such as: your email address and phone number. When you use the App, you may choose to provide Health Data.

You will also have an option to permit us to import into the App data from Apple HealthKit. Such imported information may include: sports activities, weight, calories burnt, heartbeat rate, number of steps/distance traveled, and other information about your health. Permitting us to access third party information can help you to maximize your App experience, and we will handle any such third-party information in full accordance with this Privacy Policy.

Information we collect automatically

When you access or use the App, we may automatically collect the following information (however, such information cannot be tied to you as a person, given our encryption procedures):

a. Device Information: We collect information about the mobile device you use to access the App, including the hardware model, information about the device’s operating system and its version, unique device identifiers and mobile network information.

b. Location Information: We collect your time zone, and information about your mobile service provider, which allows us to infer your general location. We do not collect your IP address.

c. Information Collected by Cookies and Other Tracking Technologies: We use various technologies to collect information about your use of the App, such as frequency of use, which areas and features of our App you visit and your use patterns generally, engagement tracking with particular features, etc. To collect this information, we may send cookies, pixel tags and web beacons to your mobile device or computer. We only use this information for internal purposes, such as improving the Services.


By creating a profile in the App, you explicitly consent that:



2. How we use your personal data and information

We may use your information, including your Personal Data, for the following purposes:

a. to analyze, operate, maintain and improve the App, to add new features and services to the App;

b. to customize content you see when you use the App;

c. to provide and deliver the products and services you request, process transactions and send you related information, including confirmations and reminders

d. to send you technical notices, updates, security alerts and support and administrative messages;

e. for billing (invoicing), account management and other administrative purposes, if applies;

f. to respond to your comments, questions and requests and provide customer service;

g. to monitor and analyze trends, usage and activities in connection with our App;

h. for any other purposes disclosed to you at the time we collect Personal Data or any other purposes indicated in this Privacy Policy.

Neither we nor our service providers will sell your information, including your Personal Data, to third parties, including but not limited to advertising platforms, data brokers, or information resellers. Nor will we or our service providers process Personal Data in a way that is incompatible with the purposes for which it has been collected or subsequently authorized by you in accordance with Section 2 of this Privacy Policy or collect any Personal Data that is not required for the mentioned purposes. For any new purpose of processing, we will ask your separate explicit consent. To the extent necessary for those purposes, we will take all reasonable steps to ensure that Personal Data is reliable for its intended use, accurate, complete, and current. We also undertake to collect only such amount and type of Personal Data that is strictly required for the purposes mentioned in this Section of the Privacy Policy (“data minimization principle”).

Disclosure of Your Information

We want you to understand when and with whom we may share the information we collect. We only disclose information that we collect through the Services with third parties as follows:

Service Providers. We may share your information with our service providers that perform certain functions or services on our behalf, such as to host the Services or perform analyses. Except as to Rownd, all information provided to our service providers is shared in an anonymized form. Your PII and Health Data cannot be linked by us or our service providers because they have been anonymized from each other.

Other Parties When Required By Law or as Necessary to Protect the Services.  We may disclose your anonymized information to third parties in order to protect the legal rights, safety, and security of the Company and the users of our Services; enforce our Terms of Service; and prevent fraud. In addition, the Company may also receive information requests from law enforcement or other government entities and/or be served with a legal process. While the Company may be legally required to produce information in response to such request or legal process, any Health Data that the Company is required to share will remain anonymous such that it cannot be linked back to you.

In Connection With a Transfer of Assets. If we sell all or part of our business, or make a sale or transfer of assets, or are otherwise involved in a merger or business transfer, or in the event of bankruptcy, we may transfer your anonymized information to one or more third parties as part of that transaction.

You will be notified via email and/or a prominent notice on our Site of any change in ownership or uses of your Personal Information, as well as any choices you may have regarding your Personal Information.

Choices about how We collect, use and disclose your information

We strive to provide you with the choices regarding our collection, use and disclosure of the information you provide to us. The mechanisms listed below aim to provide you with control over such collection, use and disclosure:

Marketing Communications: If you do not want us to send you marketing or promotional communications, you can opt-out by clicking the “unsubscribe” link in any such promotional emails, checking the relevant box located on the form on which we collect your data or emails us at support@stardust.app.

Cookies: You have the option to accept or disable cookies at any time through your browser. You may refuse to accept browser cookies by activating the appropriate setting on your browser. If you choose to disable your cookies, your user experience may be limited.

Mobile Analytics: If you are using our App, we use Mobile Device IDs, instead of cookies, to recognize you. We use the Mobile Device IDs and other mobile analytics software solely to allow us to better understand the functionality of our mobile software on your phone.

3. Your rights

Modification, correction and erasure

You are able to modify, correct, erase, and update your Personal Data by writing us at  support@stardust.app


You have a right to access your Personal Data you insert into the App and ask us about what kind of Personal Data we have about you. You can do this by using the app settings or by writing us at  support@stardust.app

California residents

California Civil Code Section 1798.83, also known as the “Shine The Light” law, permits our users who are California residents to request and obtain from us, once a calendar year and free of charge, information about categories of personal information (if any) we disclosed to third parties for direct marketing purposes and the names and addresses of all third parties with which we shared personal information in the immediately preceding calendar year. If you are a California resident and would like to make such a request, please send an email to  support@stardust.app

If you are under 18 years of age, reside in California, and have a registered account with the Site, you have the right to request removal of unwanted data that you publicly post on the Site. To request removal of such data, please contact us using the contact information provided and include the email address associated with your account and a statement that you reside in California. We will make sure that the data is not publicly displayed on the Site, but please be aware that the data may not be completely or comprehensively removed from our systems.

To request any other changes or information about our collection, use or disclosure of your information, please email us at  support@stardust.app.

Children Under the Age of 13

Our Services are intended for users who are 13 years of age and older. If you are under the age of 13, you are not permitted to submit any Personal Information to us. If you believe we might have any information from or about a child under 13, please contact us at  support@stardust.app.

4. Retention of your personal data

We will retain your Personal Data as long as your account is active or needed to provide you Services, and only for as long as it serves the purposes of processing identified in Section 2 of this Privacy Policy. Any retained PII and Health Data is separated by our encryption process and can only be linked by you. At any time, you can remove your Personal Data as specified in Section 3 of this Privacy Policy.

5. Personal data you elect to share with third parties

You may direct us to share data from the App with third parties, such as Apple HealthKit. If you direct us to share your data with a third party, that third party will have their own privacy policy and we do not control how the third party uses or handles the information. You can revoke your consent to share information with such a third party at any time in your App account settings. We take reasonable steps in order to ensure compliance of such third parties with any applicable laws that might govern processing of your Personal Data. For example, for the EU residents’ Personal Data we make reasonable efforts to ensure that such third parties are GDPR compliant and have GDPR compliant privacy policies in place.

All data shared at your direction with a third party such as Apple HealthKit is shared in anonymized form and cannot be linked to you.

6. Security

We take all reasonable and appropriate measures (including encryption) to protect all collected Personal Data from loss, theft, misuse and unauthorized access, disclosure, alteration and destruction, taking into account the nature of the Personal Data that we process and risks associated with special categories of Personal Data we collect (information about health).

7. Third party links

Although the App may contain links to third party websites or services, we are not responsible for the privacy policies and/or practices on those third-party websites or services. Please understand that this Privacy Policy applies only to information we collect from you. If you are using a third-party link, we will make it clear that such link is to a third party. Where we have linked to a third-party website or service, you should read the privacy policy stated on that third-party website or service.

8. Privacy of payments

To process payments for particular features and functions of the App we may engage third-party payment providers. For example, we use Apple and Google for processing of payments in connection with our subscriptions offered on App Store and Google Play. Please note that we never collect and we are not responsible for the collection or security of banking, financial, and payment information. Such information is processed and stored by Apple and Google only.

9. Information Applicable to EU Users

The General Data Protection Regulation or "GDPR" gives certain rights to individuals in the European Union in relation to their personal data. As available and except as limited under applicable law, the rights afforded to individuals are:

a. Right of Access - the right to be informed of and request access to the personal data we process about you;

b. Right to Rectification - the right to request that we amend or update your personal data where it is inaccurate or incomplete;

c. Right to Erasure - the right to request that we delete your personal data;

d. Right to Restrict - the right to request that we temporarily or permanently stop processing all or some of your personal data;

e. Right to Object:

f. Right to Data Portability - the right to request a copy of your personal data in electronic format and the right to transmit that personal data for use in another party’s service; and

g. Right not to be subject to Automated Decision-making - the right to not be subject to a decision based solely on automated decision making, including profiling, where the decision would have a legal effect on you or produce a similarly significant effect.

If you wish to exercise any of the above rights, please contact us at support@stardust.app.

10. Contact us

If you have any questions or concerns about your privacy, any provisions of this Privacy Policy or any of your rights, you may contact us at: support@stardust.app.

We are committed to constantly improving our security efforts. If you’d like to consult or contribute please reach out to us at security@stardust.app.