Privacy Policy | ThunderVolt

Overview

ThunderVolt is designed to respect your privacy. The app runs locally on your Mac and communicates only with Apple's iCloud infrastructure for features you explicitly enable. We do not run advertising networks, sell data, or track your usage.

What We Collect

ThunderVolt collects the minimum data required to operate its features:

Battery telemetry — charge level, cycle count, health percentage, temperature, and power draw are read from your Mac's System Management Controller (SMC). This data never leaves your device unless you enable iCloud sync.
Charging preferences — your configured charge limit, mode (Storage, Normal, Full), and schedule are stored locally in ~/Library/Application Support/ThunderVolt/.
iCloud sync (Advanced plan, optional) — if you sign in with Apple ID and enable sync, your preferences and anonymized battery health trends are stored in your personal CloudKit private database. No one at ThunderVolt can read your CloudKit data.
License key — your subscription status is verified against LemonSqueezy's API. The verification request includes your license key only; no device fingerprint or personal information is transmitted.

What We Do Not Collect

No analytics, crash reporting SDKs, or telemetry beacons
No advertising identifiers or cross-app tracking
No email address, name, or payment information (payments are handled entirely by LemonSqueezy)
No browsing history, keystrokes, or clipboard contents

iCloud and CloudKit

The Advanced plan uses Apple CloudKit to sync your settings and battery trends across your Mac, iPhone, and Apple Watch. Your CloudKit data is stored in your private iCloud container — ThunderVolt has no server-side access to it. Apple's iCloud privacy policy applies: apple.com/legal/privacy.

Sign in with Apple

ThunderVolt uses Sign in with Apple for account authentication on iOS and watchOS. Apple may share a private relay email address with us for account recovery purposes. We do not use this email for marketing.

License Verification

To activate Advanced features, the app contacts LemonSqueezy's license validation API. Only your license key is sent — your IP address is processed by LemonSqueezy's servers as part of the network request. LemonSqueezy's privacy policy applies: lemonsqueezy.com/privacy.

Data Retention and Deletion

All local app data is deleted when you uninstall ThunderVolt (the app removes its support files and LaunchDaemon on uninstall). To delete your iCloud data, go to System Settings → Apple ID → iCloud → Manage Storage and remove ThunderVolt. You can also contact us at the address below and we will confirm deletion within 30 days.

Children's Privacy

ThunderVolt is not directed at children under 13. We do not knowingly collect personal information from children.

Changes to This Policy

Material changes will be posted on this page with an updated effective date. Continued use of the app after changes constitutes acceptance.

Contact

Questions or data requests: privacy@thundervolt.app