Last updated: 26 September 2026
This Privacy Policy explains how Chartby ("Chartby," "we," "us," or "our") collects, uses, and shares information when you visit https://chartby.app (the "Website") or use the Chartby mobile and web applications (collectively, the "App"). Chartby is an AI-powered chart analysis companion that offers chat, insights, and personalized features.
By accessing or using the App or Website, you agree to this Privacy Policy and our Terms of Use. If you do not agree, please do not use Chartby.
1. Information We Collect
- Account and Profile Information: Email, username, and password when you register. We also support OAuth sign-in via Apple and Google; we receive identifiers needed to authenticate but do not obtain your social media content.
- Authentication Data: We maintain an authentication token to keep you signed in. On mobile, this token is stored in secure device storage. We also support anonymous accounts that may later be converted to registered accounts.
- Content You Provide: Chart screenshots and images you upload for analysis, the AI-generated analysis results (pattern, technical analysis, indicators, trade setup, market sentiment, prediction, risk level) saved to your account, and any messages, prompts, projects, and chat histories you send to the assistant.
- Device and Usage Information: Device model, OS version, app version, IP address, language, in-app events, and general interaction data. We may infer coarse location from IP address; we do not collect precise GPS location.
- Crash and Diagnostics: Crash reports and diagnostics to help us troubleshoot and improve stability.
- Push Notification Tokens: If you enable notifications, we collect a device push token to deliver them. You can disable notifications in your device settings.
- Purchase Information: Subscription and purchase status, entitlement information, and related identifiers necessary to provide paid features and restore purchases. In-app purchases are processed by Apple App Store or Google Play. Chartby does not receive full payment card details.
- Advertising, Attribution and Identifiers: If you use the ad-supported experience, we may collect or access advertising identifiers (e.g., IDFA/GAID) and show ads through our partners. We also use an install attribution partner (Tenjin) that receives device identifiers to measure which campaigns led to an install. On iOS these identifiers are only used for tracking if you allow it in the App Tracking Transparency prompt; where required, we request consent and honor your platform ad settings.
- Cookies and Similar Technologies (Website): We use cookies and similar technologies on the Website for essential functionality, analytics, and preference storage. Your browser may offer controls to manage cookies.
2. How We Use Information
- Provide, operate, and improve the App and Website
- Authenticate users, maintain sessions, and secure accounts
- Deliver chat and personalization features
- Process purchases, manage entitlements, and restore access
- Measure performance and usage (analytics) and improve quality (crash logs)
- Show ads (where applicable) and measure ad performance, subject to consent where required
- Send service communications, updates, and, where permitted, marketing messages
- Comply with law, enforce terms, and protect the rights, safety, and security of users and the service
3. Legal Bases (EEA/UK users)
Where GDPR or similar laws apply, we rely on one or more of the following legal bases: performance of a contract, legitimate interests (e.g., to secure and improve the App), consent (e.g., cookies/ads where required), and compliance with legal obligations.
4. Sharing and Disclosures
We do not sell your personal information. We may share information with:
- Service Providers: To host, process, and operate the App (e.g., backend, analytics, crash reporting, messaging, ads, payments/subscriptions).
- Analytics and Crash Reporting: Google Firebase Analytics to measure usage, and GlitchTip (a Sentry-compatible error tracker) to collect crash and performance diagnostics linked to your account ID.
- Advertising and Attribution Partners: Google Mobile Ads (AdMob) to show and measure ads, and Tenjin for install attribution (both subject to consent where required). These partners receive device identifiers, coarse location derived from your IP address, and ad interaction data. We use industry-standard consent tooling where applicable.
- Subscription and Purchase Processing: RevenueCat to manage entitlements, link purchases to your account, and restore access.
- Authentication: Apple and Google for optional sign-in.
- Backend: Our API and database services (PocketBase) to store accounts, uploaded chart images, analysis results, projects, chats, and history. Chart analysis is performed by third-party AI model providers that process the uploaded image and your prompt and return a result; they do not receive your account details.
- Legal/Compliance: If required by law, to protect rights and safety, or in connection with a merger, acquisition, or asset transfer.
5. Cookies and Choices
On the Website, you can manage cookies via your browser settings. Mobile platforms provide settings to reset or limit advertising identifiers (IDFA/GAID). We do not respond to "Do Not Track" signals. In supported regions (e.g., EEA/UK), we use consent dialogs for non-essential cookies/analytics and ad personalization where legally required. You can update your choices at any time via the Website's cookie preferences link.
6. Data Retention
We retain information as long as necessary to provide the App, comply with law, resolve disputes, and enforce agreements. Retention varies by data type, account status (e.g., active vs. deleted), and legal requirements.
7. Your Rights
Depending on your location, you may have rights to access, correct, delete, or port your data; object to or restrict certain processing; and withdraw consent where processing is based on consent. You can delete your account and all data associated with it at any time from the App under Profile → Account → Delete Your Account; you can also request deletion by contacting us at the email below. If you delete your data, some features may no longer work. You may also have the right to complain to a supervisory authority.
8. Security
We use technical and organizational measures appropriate to the risk (e.g., secure storage for tokens, encryption in transit) to protect your information. No method of transmission or storage is fully secure.
9. International Transfers
We may process and store information in countries outside your own. Where required, we implement appropriate safeguards for cross-border transfers, such as the European Commission's Standard Contractual Clauses for transfers to countries without an adequacy decision.
10. Children's Privacy
Chartby is not directed to children. We do not knowingly collect personal information from children under 13 (or under 16 in the EEA/UK). If you believe a child has provided information, contact us and we will take steps to delete it.
11. Changes to This Policy
We may update this Privacy Policy. We will post updates here and update the "Last updated" date. Material changes will be communicated as required by law.
12. Contact Us
If you have questions or wish to exercise your privacy rights, contact us:
Email: info@pixoby.space
Links: Terms of Use, Privacy
13. California Privacy Rights (CPRA)
California residents have the right to know, access, correct, delete, and port certain personal information, and to opt out of the sale or "sharing" (cross-context behavioral advertising) of personal information. We do not sell personal information. To the extent our use of advertising partners constitutes "sharing," you may opt out by contacting us at info@pixoby.space with the subject "CPRA Opt-Out." Where supported, we will honor applicable opt-out preference signals (e.g., Global Privacy Control) as required by law.