Driving School Vehicle Fuel and Service Cost Log

Driving School Vehicle Fuel and Service Cost Log is an offline app (one HTML file in a zip) for the owner of a small driving school or an individual instructor. You enter each fill with the odometer reading, litres, amount and whether the tank was filled. The app measures the distance between full fills, adds up the litres and money of every fill in between, and shows litres per 100 km and cost per 100 km for that stretch. Services and repairs go in a second list. For every car you see the fuel economy, the running cost per 100 km, the spend this month, and whether the latest stretch is worse than the car's own average.

The problem it removes: Fuel and workshop money disappears into the school's general costs. Nobody knows what one car costs to run per 100 km, a leaking tank or worn tyres only show up as a bigger fuel bill, and a wrong odometer typed at the pump spoils every figure after it. This app checks the odometer against the dates, keeps full and partial fills apart, and shows each car's economy against itself.

What is inside:

• Cars with plate, instructor, status and the odometer at the start of the log
• Fuel fills with odometer, litres, amount and a full tank tick, with price per litre worked out
• For every full fill: distance since the last full fill, litres per 100 km and cost per 100 km, counting partial fills in between
• Services and repairs with kind, cost, workshop and the distance since the same kind of work last time
• Per car: average litres per 100 km, latest stretch, running cost per 100 km with services, spend this month and last fill date
• A Check flag when the latest stretch is above the car's own average by the percentage you set
• Front page, a monthly spend chart, a printable car cost sheet and a fuel list
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: small driving schools, instructors who own their training car, and school owners who pay the fuel and workshop bills for several cars.

What it is NOT: It does not track registration, insurance or service reminders: use the Fleet Registration, Insurance and Service Due Tracker for dates and due services. It does not read fuel cards, connect to a car or a pump, track location or tell you what a normal consumption is. Every figure comes from the odometer, litres and amounts you type. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (123 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 2205 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed; Firefox: could not be launched. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).