Privacy Policy
Effective date: March 20, 2026 · Product: Crypto Trade Calculators (tradingcalc.io, @perpcalcbot)
What we collect
When you use our Telegram Mini App, we receive basic profile information provided by Telegram: your Telegram user ID, username (if public), first name, and language code. We do not receive your phone number or email address.
We store records of your calculation activity (type of calculator used, timestamp) to enforce free tier limits and provide calculation history to Premium users. We do not store the values you enter into calculators.
If you make a payment, we store the transaction hash, amount, currency, and timestamp to verify the payment and prevent duplicate charges.
What we do not collect
We do not collect passwords, email addresses, phone numbers, or financial account details. We do not read your Telegram messages or chats. We do not track your activity outside of this app.
How we use your data
- ·To provide the calculator service and enforce free tier quotas
- ·To process and verify payments (TON, USDT, Telegram Stars)
- ·To detect errors and improve reliability
- ·To understand product usage in aggregate (anonymized analytics)
Third-party services
We use the following third-party services to operate the product:
| Service | Purpose | Data shared |
|---|---|---|
| Telegram | Platform provider | User ID, payments |
| Neon (PostgreSQL) | Database | User ID, calc runs, payments |
| Upstash (Redis) | Caching | Temporary market data only |
| TonAPI | TON payment verification | Transaction hashes |
| Sentry | Error tracking | Anonymized error logs |
| PostHog | Product analytics | Anonymized usage events |
| Google Analytics | Web analytics | Anonymized web visits |
| Binance / Bybit / OKX / Hyperliquid / Aster / KuCoin / MEXC | Live market data | No user data shared |
Data retention
Calculation history is retained for 12 months. Payment records are retained for 3 years for accounting purposes. You can request deletion of your data at any time by contacting us.
Your rights
You may request access to, correction of, or deletion of your personal data at any time. To do so, open @perpcalcbot on Telegram and send a message describing your request. We respond within 48 hours.
Cookies and tracking
The web version (tradingcalc.io) uses Google Analytics with anonymized IP addresses. No advertising cookies or cross-site tracking are used. You can opt out via your browser privacy settings or by using an ad blocker.
Children
This service is not directed at children under 18. We do not knowingly collect data from minors.
Changes to this policy
We may update this policy from time to time. Significant changes will be announced via the Telegram bot. The effective date at the top of this page will always reflect the latest version.
Contact
For any privacy-related questions, open @perpcalcbot on Telegram. We respond within 48 hours.