Effective Date: June 23, 2026 | Last Updated: July 12, 2026
This Privacy Policy describes how ZoomFuel ("the App", "we", "our") handles information when you use the application on Android. By using ZoomFuel, you agree to the practices described in this policy.
ZoomFuel is a fuel and EV charging cost tracker for personal vehicles. It is developed and maintained by an independent developer.
ZoomFuel stores the following data in a local SQLite database on your device. This data stays on your device only unless you sign in and turn on Cloud Sync, in which case it is also uploaded to our server as described in Section 3.
| Category | Data | Storage |
|---|---|---|
| Vehicle info | Vehicle name, brand, license plate, vehicle type (Gas / Electric / REEV) | Local only |
| Fuel / charge records | Date, fuel type, amount (liters / kWh), unit price, total cost, odometer, distance, station name, notes | Local only |
| Custom fuel types | User-defined fuel type names and EV flag | Local only |
| App settings | Theme (dark/light), language, currency, distance unit, accent color | Local only |
| Translation cache | Translated UI strings cached in SQLite to reduce repeated API calls | Local only |
ZoomFuel offers an optional account and Cloud Sync feature so your data can follow you across devices (for example, phone and tablet). This feature is off by default — the app works fully offline until you choose to sign up.
| Data | Purpose | Storage |
|---|---|---|
| Email address, password | Create and sign in to your account | Server — password is never stored in plain text; we store a salted PBKDF2 hash only |
| Access & refresh tokens | Keep you signed in without re-entering your password | Server + on-device secure storage |
| Vehicles, fuel/charge records, maintenance records, reminders, custom fuel types, stations, and app settings | Sync your data across your signed-in devices; also kept as a safety copy on our server | Server (only while Cloud Sync is enabled) |
Our server (ZoomFuel.Api) runs over HTTPS and stores this data in a database we operate. Only your own signed-in account can read or write your synced data — the server identifies you from your login session and never lets one account access another account's data.
You can stop syncing at any time by signing out in the app. To permanently delete your account and server-side data, contact us at the email in Section 11 — we don't yet have a self-service "delete account" button in the app.
ZoomFuel connects to external services for specific features. Each service operates under its own privacy policy.
| Service | Purpose | Data Sent |
|---|---|---|
| Google AdMob ads.google.com |
Display banner and native ads within the app | Device identifiers, IP address, ad interaction data (managed by Google). See Google Privacy Policy. |
| Open-Meteo open-meteo.com |
Show current weather / temperature on the Dashboard | Your device's GPS coordinates (latitude & longitude) at the time of request. Open-Meteo is a privacy-friendly, non-commercial weather API. See Open-Meteo Terms. |
| MyMemory Translation API mymemory.translated.net |
Translate app UI text when a language other than English or Thai is selected | The text string to be translated and the target language code. No personal or vehicle data is sent. See MyMemory Privacy Policy. |
| Permission | When Used | Required? |
|---|---|---|
| Location (Coarse / Fine) | Fetching local weather on the Dashboard. Only requested when you open the Dashboard and weather is displayed. | Optional — app works without it |
| Internet | Loading advertisements (AdMob), fetching weather data, and translating UI text. | Required for ads & online features |
You can deny location permission at any time via Android Settings. The Dashboard will still work; weather information will simply not be shown.
ZoomFuel uses Google AdMob to display advertisements. Google may use cookies, device identifiers (including Android Advertising ID), and usage data to serve personalized ads based on your interests.
You can opt out of personalized advertising:
ZoomFuel is not directed at children under the age of 13. We do not knowingly collect personal information from children. If you believe your child has used the app and you have concerns, please contact us so we can take appropriate action.
All vehicle and fuel records are stored in a local SQLite database on your device, protected by Android's application sandbox. If you have not enabled Cloud Sync, no one — including the developer — can access your data remotely.
If you enable Cloud Sync, your synced data is transmitted over HTTPS and stored on our server. Passwords are never stored in plain text (salted PBKDF2 hashing), and sign-in uses short-lived access tokens with rotating refresh tokens rather than repeatedly sending your password.
We recommend keeping your device updated and using screen lock to protect your data in case of device loss.
You can delete your locally stored app data at any time by:
If you have used Cloud Sync, uninstalling the app does not delete data already synced to our server. You can:
We may update this Privacy Policy from time to time. Changes will be reflected by an updated "Last Updated" date at the top of this page. We encourage you to review this page periodically.
If you have any questions about this Privacy Policy or how ZoomFuel handles your data, please contact us:
Email: [email protected]