Karlog: Fuel & Mileage Tracker

No subscription. No account. No ads. One-time $19.99 upgrade unlocks unlimited logs, price charts, CSV import & iCloud backup. Free to start.

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.

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.

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.

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