Privacy Policy

This Privacy Policy describes what data Nexus Chart AI collects, how that data is collected, how it is used, and which third parties it may be shared with.

1. Data We Collect

When you use the app, we may collect and process the following data:

• Chart images. Photos or screenshots of financial charts that you capture with the in-app camera or select from your photo library for analysis.
• Trading preferences. Answers you provide in the onboarding survey: your trading experience level, the markets you trade, your trading style, and your preferred analysis detail. These answers are used to personalise the AI analysis output.
• Anonymous device / installation identifiers. Non-personal identifiers generated by your device or the analytics SDK. These are used for server-side rate-limiting, app functionality, and analytics.
• Usage and product interaction data. Events such as screen views, feature usage, onboarding steps, analysis outcomes, and subscription-related actions (for example purchase started, completed, cancelled, or restored).
• Purchase / subscription status. Whether you have an active Premium subscription and related plan type, used to unlock features and measure subscription performance. We do not collect your full payment card details; billing is handled by Apple App Store or Google Play.
• Advertising identifier (IDFA), when permitted. On iOS, if you allow tracking via Apple’s App Tracking Transparency prompt, we may access the device advertising identifier to measure the performance of our own Google Ads campaigns. If you decline, we do not use the IDFA for that purpose.

We do not collect your name, email address, phone number, precise location, contact list, or other personal contact details through the app.

2. How We Collect This Data

• Chart images are collected when you capture a photo in the in-app camera or choose an image from your photo library for analysis.
• Trading preferences are collected during the onboarding survey and stored locally on your device until you use the analysis feature.
• Device / installation identifiers and usage events are collected automatically by the app and by Google Firebase Analytics while you use the product.
• Subscription status is determined from App Store / Google Play purchase receipts and related in-app purchase APIs.
• The advertising identifier is accessed only after you grant permission through Apple’s App Tracking Transparency prompt (iOS).

3. How We Use Your Data

• Chart images and trading preferences are transmitted to our AI analysis service to generate the chart analysis results displayed to you in the app.
• Chart images may be stored on our servers so you can view your analysis history within the app.
• Anonymous device identifiers are used for rate-limiting on our servers to ensure fair service usage.
• Usage, product interaction, and subscription events are used to understand how the app is used, improve features, debug issues, and measure product performance through Google Firebase Analytics / Google Analytics.
• When you allow tracking on iOS, advertising identifiers and related conversion events may be used to measure and optimize our own Google Ads campaigns (for example installs and subscriptions). We do not use this data to serve third-party ads inside the app.

4. Third-Party Data Sharing

Your chart images and trading preferences are sent to Nexus Chart AI’s AI analysis service, operated by gre-dev (gredev.io). This service processes your data using AI models to produce the chart analysis shown to you. It acts as a data processor on our behalf and is contractually obligated to:

• Process your data only for the purpose of providing chart analysis to Nexus Chart AI.
• Apply security and data-protection measures equivalent to or greater than those described in this policy.
• Not sell or share your data with any other third party.

We also use Google Firebase Analytics (and related Google measurement services) to collect usage and conversion analytics. When you allow App Tracking Transparency on iOS, limited advertising identifier data may be shared with Google for measuring our Google Ads performance. Apple and Google may process purchase/receipt information as part of their store and billing platforms.

We do not sell your personal data. We do not share chart images with advertisers. We may disclose data where required by law.

5. User Consent

Before any chart data is transmitted to our AI analysis service for the first time, the app displays a consent screen that explains what data will be sent and who will receive it. Your explicit consent is required before chart analysis data leaves your device for that service.

On iOS, a separate App Tracking Transparency prompt may ask whether you allow use of the advertising identifier for ad measurement. You can change this later in your device settings under Settings → Privacy & Security → Tracking.

You can delete stored analysis history and related server-side analysis data from Settings → Delete Analysis Data in the app. Declining AI analysis consent means you will not be able to use the AI chart analysis features.

6. Data Security

• All data is transmitted over encrypted HTTPS connections.
• We apply reasonable technical and organisational measures to protect data against unauthorised access, loss, or misuse.

7. Data Retention

• Chart images stored for your history are retained until you delete them within the app or delete your data from Settings.
• Survey answers are stored locally on your device and are included with analysis requests while you use the feature.
• Analytics and advertising measurement data retained by Google are subject to Google’s retention practices for Firebase Analytics / Google Ads.

8. Children’s Privacy

Nexus Chart AI is not directed at children under the age of 13. We do not knowingly collect data from children.

9. Changes to This Policy

We may update this Privacy Policy from time to time. Updates will be reflected with a revised date below. Continued use of the app after an update constitutes acceptance of the revised policy.

10. Contact Us

If you have questions about this Privacy Policy or your data, please contact us at info@gredev.io.

Last updated: July 8, 2026