Position Size Calculator: PSC — Privacy Policy
Last updated: October 9, 2026
Position Size Calculator: PSC (the "App") is available on Android, iOS and web and is developed and operated by Vladyslav Boiko, a registered individual entrepreneur (ФОП) in Ukraine. HexioLab is the brand name used for the App. References to "HexioLab", "we", "us" and "our" refer to this individual entrepreneur, the data controller.
This policy describes the information processed when you use the App and how to contact us about your data. Contact: psc@hexiolab.com.
1. Information We Process
- Account: When you sign in using email/password, Google or Apple, our authentication provider processes your credentials or sign-in tokens. We store your account identifier, email address, display name and profile-photo URL when provided, sign-in provider and account timestamps. Sign-in is optional on mobile; web access requires an account.
- Calculations and preferences: Inputs, saved results, history, favorites, calculator defaults, currency, language, appearance and other preferences are stored on your device or in browser storage. Journal records may contain outcomes, profit/loss, emotions, tags and reflections. Templates are stored where that feature is available.
- Cloud sync: When signed in, the App syncs settings, saved calculations, journal data associated with them and templates to our cloud database. These records are associated with your account. Access rules restrict access between users; authorized service providers process the data to operate the service.
- Usage and diagnostics: Our analytics providers process usage events such as screen visits, calculator modes, feature interactions, limits, ads and purchase flows, together with app/device metadata. A persistent random analytics identifier is stored locally and linked to your account when signed in so activity can be correlated across devices. This is pseudonymous data, not fully anonymous data. Our mobile crash-reporting provider processes reports that may include stack traces, device/app details, diagnostic context and the same identifier.
- Purchases: Apple or Google processes payment. Our subscription-management provider processes purchase records, product identifiers and access status, linked to an app-user identifier and, when signed in, your account. Subscription/access status is also stored for cross-device access. We do not receive your full payment-card details.
- Advertising: Our advertising providers and their partners may process identifiers, IP address, device information, ad interactions and privacy choices to deliver, measure and protect ads. Ad treatment depends on consent, platform restrictions and service configuration; ads are not guaranteed to be non-personalized. Advertising consent forms and a privacy-options entry point are shown when required by the advertising consent system.
- Network services: External providers supply mobile feature configuration and reference currency rates. The rate request does not include your account balance or calculation inputs, but the provider receives network information such as your IP address. Rates are cached locally, normally for 24 hours.
- Support and sharing: If you email us, we receive your address, message and attachments. If you export or share a calculation, the data you choose to share is passed to your selected destination, which handles it under its own policies.
2. Why We Process Information
We process information to provide calculations and saved records, authenticate accounts, synchronize data, verify purchases, enforce free-tier limits, deliver ads where enabled, diagnose errors, understand feature usage and respond to support requests. Trading reminders are scheduled locally when enabled; notification permission can be managed in device settings.
Where applicable data-protection law requires a legal basis, service delivery relies on performance of our agreement with you; security, diagnostics and service improvement may rely on legitimate interests; processing requiring consent relies on that consent; and some records may be needed to meet legal obligations. Consent can be withdrawn for the processing to which it applies.
3. Service Providers
We share the information described above with service providers in the following categories, for the purposes listed. Links below explain the current providers’ privacy practices:
Providers may process data in countries other than yours under their applicable data-protection terms. We do not sell your calculation history or journal entries. Advertising-related processing is described above; its treatment under local privacy laws may vary.
4. Mobile and Web
Mobile builds may include purchases, ads, reminders, product analytics and crash reporting. The web App uses cloud services, including analytics and account synchronization, but does not show ads or offer in-app purchases. Web access depends on the account’s eligible PRO access. Browser storage and analytics may use cookies or similar technologies.
5. Your Choices and Privacy Requests
- Account deletion: Use the delete-account action in Settings. Reauthentication may be required. The operation deletes your App login account, cloud profile/settings, saved history (including associated journal data) and templates, and clears local history and templates on the device used for deletion. It does not automatically erase every device preference or copies held on other devices.
- Request deletion without the App: Email psc@hexiolab.com from your account email, identifying PSC and requesting account/data deletion. We may ask for information to verify ownership. Never send your password. See deletion support.
- Local copies: Signing out or uninstalling does not delete your cloud account. Clear app/browser storage to remove remaining local data. Device or browser backups may retain copies under their own settings.
- Advertising choices: Use the advertising privacy-options action in Settings when available, and your device’s advertising/privacy controls.
- Analytics: The App currently has no dedicated analytics opt-out switch. Device/browser restrictions may limit some collection but do not guarantee that all analytics stops. Contact us about applicable objection or deletion rights.
- Subscriptions: Deleting an account or uninstalling does not cancel an app-store subscription. Manage cancellation through the store where you purchased it.
Depending on your location, you may have rights to access, correct, delete or obtain a copy of your personal information, restrict or object to processing, withdraw consent, or complain to your local data-protection authority. Send requests to psc@hexiolab.com.
6. Retention and Security
Local records remain until removed or local storage is cleared. Account and synced records remain until deleted through the App or an applicable deletion request. Deletion of your app account does not automatically delete analytics, diagnostic or purchase records held by service providers; these have separate retention rules, and additional deletion requests may be needed. Purchase and other records may be retained where required by law. Contact us for assistance with provider-held records.
We use authenticated access and cloud security rules to protect account data. No storage or transmission method is completely secure. Avoid putting passwords, payment-card details or other unnecessary sensitive information in journal entries or support messages.
7. Children
The App is not directed to children under 13. If you believe a child has provided personal information, contact us so we can investigate and address it.
8. Policy Updates
We may update this policy as the App or its data practices change. The date above identifies the latest revision. Where required, we will provide additional notice or request consent; this policy itself is not a substitute for consent.