# Karlog: Fuel & Mileage Tracker — Car Log, MPG & Service Records > Offline car fuel, mileage, and maintenance tracker with budgeting and reminders. (iPhone/iPad app by Lyhour Huy.) - Source: https://appshunter.io/ios/app/karlog-fuel-and-mileage-tracker/id6760582596 (this page in markdown: same URL + `.md`) - Developer: [Lyhour Huy](https://appshunter.io/developer/1482096084) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 16.4 · 69 MB - Languages: American English - Released: 2026-03-17 - Data updated: 2026-07-31 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/karlog-fuel-and-mileage-tracker/id6760582596/reviews.md ## What is Karlog? 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 ## Key features - Fuel and consumption tracking - MPG and L/100km calculations - Oil change and service reminders - Maintenance and appointment logging - Monthly driving budget - EV/Hybrid support - Offline functionality ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Karlog Pro | $19.99 | one-time | ## Frequently asked questions about Karlog ### What is Karlog? Karlog is an offline-first application designed for drivers to track fuel consumption, log maintenance, and manage their vehicle's expenses. It offers features like fill-up logging, service reminders, and a monthly driving budget, all without requiring an account or internet connection. ### Does Karlog have ads? No, Karlog is completely ad-free. The application prioritizes user privacy and does not display any advertisements, ensuring an uninterrupted experience for tracking your vehicle's data. ### What vehicles does Karlog support? Karlog supports a wide range of vehicles, including traditional internal combustion engine (ICE) cars, hybrids, plug-in hybrids (PHEVs), and fully electric vehicles (EVs). For EVs and PHEVs, you can log kWh charging sessions and track charging costs. ### Is Karlog available on Android? Based on the provided data, Karlog is available on iPhone, iPad, and iPod. Platform availability for Android is not specified in this information. ### How much does Karlog Pro cost? Karlog Pro is available as a one-time purchase for $19.99. This purchase unlocks unlimited vehicles, unlimited fuel logs, price trend charts, CSV/Excel import, and iCloud backup and restore, with no recurring subscription fees. ### Can I import my old fuel data into Karlog? Yes, Karlog Pro allows you to import existing fuel logs from CSV or Excel files. This feature helps you transition your historical vehicle data seamlessly into the application. ### How often is Karlog updated? The latest version of Karlog is 1.5.1, and it was last updated on June 21, 2026. This indicates a recent update, suggesting ongoing development and support for the application. ### What languages does Karlog support? Karlog supports 12 languages, including English, French, Spanish, German, Portuguese, Arabic, Chinese, Japanese, Korean, Khmer, Thai, and Vietnamese. This broad language support makes it accessible to a global user base. ## Version history (last 5 releases) ### 1.5.3 — 2026-07-27 • Android: the Pro upgrade screen now shows local backup and CSV import instead of iCloud, which is iOS-only. • Clearer message when the store is unavailable, instead of a failed purchase. • Translation fixes. ### 1.5.2 — 2026-07-23 Fixed a bug that could make it impossible to save a fill-up. • Fuel logs save reliably again. If you're in a time zone ahead of UTC, today's date was being rejected as "in the future" during the early hours of the day — with no error message to explain why. Fixed. • Cost is now optional. Log a fill-up even when you don't know what it cost. • The comma decimal separator now works. On keyboards that use "," — Russian, French, German and more — 45,5 is read as 45.5 instead of 455. • Tapping Save straight from a number field no longer loses the last value you typed. • Validation errors are now always shown, so the form never fails silently. • Updated to the latest platform tools for better performance and stability. Thank you to everyone who reported this — your feedback found the bug. ### 1.5.1 — 2026-06-21 Bug fixes and improvements: • Fixed a glitch where the Face ID / unlock prompt could flicker or reappear when opening the app. Unlocking is now smooth and reliable. • Updated under-the-hood components for better stability. Thanks for using Karlog! Got feedback? Send it from Settings — we read every message. ### 1.5.0 — 2026-06-20 What's New in v1.5.0 Features. - Two new currencies — added Belarusian Ruble (BYN) and Indonesian Rupiah (IDR). Fixes - Backup cloud sync accuracy — keeps cloud sync status fresh and accurate across multiple devices. ### 1.4.3 — 2026-06-19 - Russian locale + full iPad landscape support — responsive layout for tablet landscape, bringing the app to 13 languages (#2/#3). - Multi-image feedback — the feedback modal now supports a subject line and up to 3 base64 image attachments via expo-image-picker. - EV/PHEV battery % — optional start/end battery percentage on EV/PHEV fuel logs. - Fixed best/worst fill-up skew from partial refuels. - CSV & Excel import for vehicle fuel logs (Pro-gated). ## More apps by Lyhour Huy - [Famnance](https://appshunter.io/ios/app/famnance/id1508746732) - [Daily Glucose Tracker](https://appshunter.io/ios/app/daily-glucose-tracker/id1586515267) - [Kromb](https://appshunter.io/ios/app/kromb/id6446094615) - [Ousa](https://appshunter.io/ios/app/ousa/id6744956439) - [Personal Investment Tracker](https://appshunter.io/ios/app/personal-investment-tracker/id6760211364) - [Famnance: Family Budget](https://appshunter.io/ios/app/famnance-family-budget/id6760258114) All apps by Lyhour Huy: https://appshunter.io/developer/1482096084 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-31.*