Karlog: Fuel & Mileage Tracker

Karlog is the fuel and mileage tracker built for drivers who want simple, private, offline car logging — no account, no subscription, no ads.

Log every fill-up, track your real-world MPG or L/100km, and watch your fuel economy trend over time. Set oil change reminders by date or odometer. Store every service record in one place. Karlog works completely offline: your data never leaves your device unless you choose to back it up.

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KEY FEATURES

Fuel & Consumption Tracking
- Log fuel fill-ups with date, odometer, liters or gallons, and cost
- Automatic MPG, L/100km, and km-per-liter calculations after every entry
- Fuel cost per kilometer or per mile
- Full fill-up history with editable entries
- CSV and Excel import for existing fuel logs (Pro)

Oil Change Reminders
- Set your service interval by distance (km or miles) and by date
- Karlog alerts you when your next oil change is approaching
- Never miss a service window again

Maintenance & Service Log
- Record oil changes, cooling system, tires, brakes, and other services
- Store date, odometer, cost, and notes per record
- Set next-due reminders for each service type

Appointments & Reminders
- Schedule upcoming inspections, registration renewals, insurance renewals, and washes
- Mark appointments as done

Monthly Driving Budget
- Set a monthly kilometer or mileage goal per vehicle
- Color-coded progress card shows how much of your budget you have used
- Alerts at 80% and 100% so you stay aware of your driving spend

Electric Vehicle & Hybrid Support
- Supports traditional ICE, hybrid, PHEV, and fully electric vehicles
- Log kWh charging sessions alongside or instead of fuel fill-ups
- Price-per-kWh trend chart tracks your charging costs over time (Pro)

Price Trend Charts (Pro)
- Line charts showing fuel price per liter over time
- kWh price trend for EV and PHEV vehicles
- Requires at least 2 data points to render

Data Import & Backup (Pro)
- Import existing fuel logs from CSV or Excel files
- iCloud backup and restore — your data syncs across your devices
- Local file export always available

Privacy & Offline First
- 100% offline — no network requests from core app logic
- No account required, no login screen, no sign-up
- No ads, no analytics, no tracking
- Your vehicle data stays on your device

12 Languages
English, French, Spanish, German, Portuguese, Arabic, Chinese, Japanese, Korean, Khmer, Thai, Vietnamese

Metric & Imperial
Switch between km/liters and miles/gallons per vehicle. All conversions are display-only — data is stored consistently in the background.

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FREE VS PRO

Free (always free):
- 1 vehicle
- Up to 20 fuel logs
- Fuel consumption stats
- Oil change reminders
- Service and appointment records
- Monthly driving budget
- All 12 languages

Pro — $19.99 one-time purchase (no subscription, no renewal):
- Unlimited vehicles
- Unlimited fuel logs
- Price trend charts
- CSV and Excel import
- iCloud backup and restore

Pay once. Own it forever. No subscription. No price increases. No features locked behind a monthly fee.

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Karlog is built for drivers who want a clean, private, offline logbook for their car — not a SaaS dashboard with a recurring bill.

Download Karlog and start logging your first fill-up in under a minute.

Privacy Policy: https://supportdock.io/vandetho/karlog/privacy
Support: https://supportdock.io/vandetho/karlog