Auto Journal logo Auto Journal by ThinkStudio
Android Application · Local-First · ThinkStudio

Auto Journal

Auto Journal is a mobile car management logbook, digital service book, and vehicle expense tracker for Android. Keep complete records of refueling, EV charging, repairs, scheduled maintenance, insurance reminders, and PDF history reports — stored privately on your device with optional cloud backup to your own Google Drive.

How Google Drive Backup Works Privacy Policy Terms of Service

What Auto Journal Does

Multi-Vehicle Garage

Store specs for multiple cars or motorcycles, including make, model, year, VIN, license plate, odometer readings, and fuel or electric powertrain profiles.

Fuel & EV Charging Log

Track fuel fills and kWh charging sessions, automatically compute L/100km or MPG consumption, monitor fuel price trends, and analyze cost per kilometer.

Digital Service Book

Record oil changes, brake replacements, inspections, parts, and repair costs with attached photos of receipts and service invoices.

Smart Reminders

Receive timely local notifications for upcoming maintenance intervals, insurance expiration, mandatory technical inspections, and driver's license renewal.

OBD-II & DTC Diagnostics

Browse Diagnostic Trouble Codes (DTC) and connect compatible ELM327 Bluetooth OBD-II adapters to inspect vehicle fault details and live parameters.

PDF & CSV/JSON Reports

Generate clean PDF service history reports for vehicle resale and export structured CSV/JSON backups at any time.

Google Sign-In & Cloud Sync Transparency

How Auto Journal Uses Google User Data

Auto Journal operates offline-first: all garage records remain in your phone's local SQLite database. Cloud backup via Google Drive is completely optional and only activates when you choose Sign in with Google inside Settings.

  • Requested Scopes: Only basic email (to display your signed-in account inside Settings) and https://www.googleapis.com/auth/drive.appdata.
  • Hidden App Data Folder Only: The drive.appdata permission restricts Auto Journal exclusively to its own hidden application folder (appDataFolder) in your personal Google Drive. The app cannot list, read, edit, or delete your personal Drive documents or photos.
  • Zero Developer Access: Backups go directly from your Android device to your personal Google Drive. ThinkStudio does not operate intermediary servers or store your vehicle logs.
  • Full Control: You can trigger manual sync/restore, sign out, delete your hidden Drive backup, or revoke access at any time.

Auto Journal's use and transfer of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements. Read our full Privacy Policy and Terms of Service.