Privacy Policy
Last updated: March 28, 2026 · Applies to altcoinsignal.pro
Summary: We collect minimal data necessary to provide our service. We do not sell your personal data. You have full rights over your data under GDPR. Contact us at hola@onyxconsultory.com for any request.
1. Controller
AltcoinSignal ("we", "us") operates the website altcoinsignal.pro. For GDPR purposes, AltcoinSignal is the data controller. Contact: hola@onyxconsultory.com
2. Data we collect
| Category | Data | Source | Legal basis |
|---|---|---|---|
| Account data | Email address, name, profile picture | Google OAuth or magic link | Contract performance (Art. 6(1)(b) GDPR) |
| Wallet address | Public blockchain wallet address | Wallet connect (user-initiated) | Contract performance (Art. 6(1)(b) GDPR) |
| Usage data | Pages visited, interactions, browser/OS type, IP address | Google Analytics | Consent (Art. 6(1)(a) GDPR) |
| Payment data | Billing name, country, last 4 card digits (tokenised) | Stripe — we never store full card numbers | Contract performance + legal obligation |
| Watchlist | Coin IDs saved to watchlist | User action | Contract performance (Art. 6(1)(b) GDPR) |
| Cookies | Session tokens, analytics cookies, preferences | Browser storage | Consent / legitimate interest |
3. How we use your data
- Provide and maintain the platform (account, watchlist, alerts, subscriptions)
- Process subscription payments via Stripe
- Send transactional emails (magic link, payment receipts, alert notifications)
- Analyse aggregate usage to improve the product (Google Analytics)
- Comply with legal obligations (fraud prevention, tax records)
We do not sell, rent, or share your personal data with third parties for their own marketing purposes.
4. Third-party processors
| Processor | Purpose | Location |
|---|---|---|
| Supabase | Database, authentication | EU (AWS Frankfurt) |
| Stripe | Payment processing | EU/US — SCCs in place |
| Google (OAuth + Analytics) | Authentication, usage analytics | EU/US — SCCs in place |
| Vercel | Hosting, CDN | EU/US — SCCs in place |
| CoinGecko | Market data API (no personal data sent) | — |
5. Data retention
- Account data: retained while your account is active, deleted within 30 days of account deletion request
- Payment records: retained for 7 years (legal/tax obligation)
- Analytics data: 14 months (Google Analytics default)
- Server logs: 30 days
6. Your rights under GDPR
As an EU/EEA resident, you have the right to:
- Access — request a copy of the data we hold about you
- Rectification — correct inaccurate data
- Erasure — request deletion ("right to be forgotten")
- Restriction — limit how we process your data
- Portability — receive your data in a machine-readable format
- Objection — object to processing based on legitimate interest
- Withdraw consent — at any time for consent-based processing (e.g. analytics cookies)
To exercise any right, email hola@onyxconsultory.com. We will respond within 30 days. You also have the right to lodge a complaint with your national data protection authority.
7. Cookies
We use cookies for authentication sessions, user preferences, and analytics. See our full Cookie Policy for details. You can manage your preferences through our cookie banner at any time.
8. Children
Our platform is not directed at children under 16. We do not knowingly collect data from minors. If you believe a child has provided us with personal data, contact us immediately.
9. Changes to this policy
We may update this policy periodically. Significant changes will be notified via email or a banner on the site. Continued use after changes constitutes acceptance.
10. Contact
AltcoinSignal · hola@onyxconsultory.com