CHARGEWISE / PRIVACY

App privacy policy

Your battery.
Your information.

ChargeWise keeps battery readings and app settings on your device. This policy explains its optional permissions, local records, and the limited information used to verify Google Play purchases.

Last updatedOctober 23, 2026

Read the ChargeWise Terms of Use

01 / PROVIDER

No account is required.

ChargeWise is provided by Hector Cruz / H/Studio. You do not need an account or login to use the app. This policy covers ChargeWise for Android; the separate H/Studio website privacy notice covers visits to this website.

02 / BATTERY AND APP DATA

Battery readings are processed on your device.

When Android provides them, ChargeWise reads battery percentage, charging state, battery health status, temperature, voltage, plug type, and current. It processes readings on-device to show status and calculate charging-speed, charging-time, and estimated battery-condition trends. These are app calculations from available device information.

Settings, reminder choices, charging-session records, temperature samples, and limited discharge observations are kept in app-private storage. ChargeWise does not upload battery readings or Usage Access results for analytics.

03 / PERMISSIONS

Optional access stays under your control.

  • Internet: Used for Google Play billing and online purchase verification.
  • Notifications: On Android 13 and later, notification permission is optional. It enables local charging, bedtime, temperature, and charging-speed notifications. Turn notifications off in ChargeWise or revoke permission in Android settings.
  • Usage Access: Optional and read only while App Activity is open. It lets the app display app names and package identifiers plus Android-reported foreground and foreground-service time for a selected period. ChargeWise does not save or transmit this activity list. It is not battery-usage data. Revoke it in Android's special app access settings.

04 / PURCHASES AND VERIFICATION

Google Play handles checkout.

Google Play processes checkout and payments. ChargeWise does not receive complete payment-card or payment-method details. To verify or restore a purchase, the app sends its package name, the Google Play product ID, and the purchase token over HTTPS to the Cloudflare-hosted verification Worker. The Worker contacts Google's Play verification service to check ownership and expiry.

The committed Worker code does not write purchase tokens to persistent storage or include them in diagnostic payloads. If operator-enabled diagnostics are active, the code emits only an allow-listed stage, upstream status, and error code. Cloudflare may process request and network metadata under its own policies. H/Studio does not control Cloudflare's platform logging settings or retention period. See the Google Privacy Policy and Cloudflare Privacy Policy.

05 / LOCAL STORAGE AND DELETION

Clear storage to remove local app data.

Settings and local battery data stay in ChargeWise's private app storage. Charging history, temperature samples, and discharge observations have no automatic retention cutoff defined in the current app source. Android app backup is disabled for ChargeWise.

To remove local data, use Android Settings > Apps > ChargeWise > Storage > Clear storage, or uninstall the app. This removes local records and cached Premium authorization. It does not cancel a subscription or delete separate records held by Google Play, Cloudflare, or your email provider.

06 / PURCHASE RECORDS AND OFFLINE ACCESS

Purchase authorization is protected on the device.

Purchase tokens, pending purchase-confirmation status, and verification proofs are stored in an encrypted, device-bound file protected with Android Keystore and kept outside Android backup. The app defines no fixed local retention period for its purchase ledger; unresolved records may remain while Play reconciliation or confirmation is pending.

A verified proof can support offline Premium access for up to 24 hours, but may expire sooner at the verified subscription end and depends on device boot and elapsed-time checks. A reboot, expired proof, or invalid proof can require online verification. A full 24 hours of offline access is not guaranteed.

07 / EMAIL AND OTHER PROVIDERS

External services have separate practices.

If you choose to contact support, your email address and message go through your email provider to [email protected]. H/Studio and the providers involved may retain correspondence under their own practices. The app does not send support email automatically. Google Play, Cloudflare, and email providers handle information under their own policies; H/Studio cannot remove records they hold independently.

08 / SECURITY AND CHILDREN

Local safeguards reduce risk.

ChargeWise stores app data in Android's private application storage. Its local purchase ledger uses authenticated AES-GCM encryption with a device-bound Android Keystore key. Other preferences and charging history are not separately encrypted by the app. HTTPS protects purchase-verification requests in transit. These safeguards cannot guarantee complete security; keep Android and your device protected with current updates and a screen lock.

ChargeWise is not directed to children under 13 and does not knowingly solicit personal information from children through the app. A parent or guardian with a privacy concern can contact [email protected].

09 / YOUR CHOICES AND RIGHTS

Manage permissions or ask about your information.

You can choose whether to grant optional Usage Access and notification permission, turn notifications off, and remove local data using Android settings or by uninstalling the app. Where applicable, you may email [email protected] to ask about access to, correction of, or deletion of information H/Studio holds. H/Studio cannot change or delete records held independently by Google Play, Cloudflare, or your email provider.