NOSTROMO app privacy policy

Last updated: 23 October 2026

This policy explains how the NOSTROMO app (for Android and iPhone) and the nostromoapp.com website process personal data, in accordance with Regulation (EU) 2016/679 (GDPR) and Italian Legislative Decree 196/2003. The Italian version is available here.

NOSTROMO does not require an account: we don’t ask for your name, email or phone number to use the app. Most of the data you enter (boat profile, maintenance jobs, documents) stays only on your phone.

1. Data controller

2. What data NOSTROMO processes and why

Data that stays on your phone

Your boat profile, maintenance jobs and due dates, documents and safety gear (including photos of documents), favourite weather spots, routes, quiz results and app preferences are saved only in your phone’s memory. We don’t receive them and can’t see them. If you uninstall the app they are deleted.

Anonymous device code

The first time you open the app it creates a random code (for example d-lx3k2-9f8a7b) that contains no information about you. It is used to count your free questions to Nostromo, recognise your Premium subscription and link your posts in the Crew.
Legal basis: performance of the service you requested (Art. 6(1)(b) GDPR).

Location

With your permission the app uses your phone’s location only while it is open, to show you the weather where you are, calculate routes and navigation, run the anchor alarm and find nearby harbours. The coordinates are sent to the weather and map services listed in section 3 to get forecasts and charts. Weather requests go through our server, which does not log your position and keeps the answer in memory for a few minutes only, to serve identical requests faster. You can refuse or withdraw the permission in your phone settings: the weather will then use a default area.
Legal basis: consent (Art. 6(1)(a) GDPR), which you can withdraw at any time.

Questions and photos to Nostromo (AI assistant)

When you write to Nostromo, the text of the conversation, any photo, a summary of your boat profile and the weather are sent to our server and from there to the artificial intelligence provider Anthropic to generate the answer. Our server does not save the content of conversations: it only keeps the number of questions asked in the month, linked to the anonymous code. Don’t include personal data in your questions that you don’t want to share. If you report an answer with the “Report” button, we keep that question and answer only to review them, for up to 12 months.
Legal basis: performance of the service (Art. 6(1)(b) GDPR).

Crew (public content)

If you post in the Crew, the name you choose, your boat model, the text, the photo and any place you write become visible to other users and are stored on our server. To protect the community, posts and comments are checked automatically by an artificial intelligence system (Anthropic) before they are published. We also keep reports and likes linked to the anonymous code. You can delete your posts from the app at any time.
Legal basis: performance of the service (Art. 6(1)(b)) and legitimate interest in keeping the community safe (Art. 6(1)(f)).

Premium subscription

Payments are handled entirely by Google Play or Apple’s App Store: we never receive or see your card details. To check whether your subscription is active we use the RevenueCat service, which receives the purchase information from the store (plan, dates, status) linked to the anonymous code.
Legal basis: performance of the contract (Art. 6(1)(b)) and legal obligations (Art. 6(1)(c)).

Camera and photos

The app accesses the camera and your photos only when you ask it to (to send a photo to Nostromo, post it in the Crew or save a document). It does not access any other photos.

Notifications

Due-date reminders are notifications created on the phone itself: they don’t go through our servers.

The nostromoapp.com website

The website uses no profiling cookies or analytics tools. The provider hosting the website may record technical access data (such as the IP address) for security and operation.

3. Who we share data with

We don’t sell data and we don’t use it for advertising. We use these providers, each only for its own purpose:

Some providers are located in the United States. In these cases the transfer is based on the EU-US Data Privacy Framework or on the Standard Contractual Clauses approved by the European Commission.

4. How long we keep data

• Data on your phone: until you delete it or uninstall the app.
• Count of questions to Nostromo: up to 13 months.
• Crew posts and comments: until you delete them, or until they are removed for breaking the rules.
• Subscription data: for the duration of the subscription and for the periods required by tax law.

5. Your rights

You can ask at any time to access, correct or delete your data, restrict or object to its processing, or receive it in a readable format (Articles 15–22 GDPR), and you can withdraw your consent to location. Write to support@nostromoapp.com saying that it concerns NOSTROMO. You also have the right to lodge a complaint with the data protection authority of your country (in Italy, the Garante per la protezione dei dati personali).

How to delete your NOSTROMO data

NOSTROMO has no accounts. To delete the data on your phone, simply uninstall the app. To delete your Crew posts use “Delete post” in the app; to delete everything linked to your anonymous code (question count, posts, comments, reports) write to support@nostromoapp.com with the subject “NOSTROMO data deletion”: we will do it within 30 days.

6. Minors

NOSTROMO is intended for adults and does not knowingly collect data from people under 18.

7. Changes

If we change this policy we update the date at the top and, for important changes, we let you know in the app.