TechSheet: A Vehicle Maintenance Tracker Built for Car Enthusiasts
You know the feeling. You’re at the track and someone asks when you last changed your brake fluid. You think it was… spring? Or was that the diff fluid? You dig through a folder of crumpled receipts in the glovebox and find nothing useful.
Or you’re selling a car and the buyer wants a service history. You know you’ve been meticulous about maintenance, but the proof is scattered across three shops’ email confirmations, a Notes app list you stopped updating in 2024, and a stack of invoices in a drawer somewhere.
I built TechSheet because I was tired of losing track of what I did to my own cars.
What TechSheet does
TechSheet is a vehicle maintenance tracker for iPhone designed for people who actually care about their cars:
- Complete service logging — Oil changes, brake jobs, tire rotations, fluid flushes, mod installs — log anything with costs, notes, mileage, and photo attachments
- Maintenance schedules — Set mileage-based and time-based intervals for every service. Get notified when something is due so you’re never guessing
- Document storage — Registration, insurance, inspection, warranty docs — all in one place with expiration tracking. Pull up your insurance in two taps at a traffic stop
- OBD-II live data — Connect any ELM327 Bluetooth adapter to monitor RPM, coolant temp, speed, fuel level, and battery voltage. Auto-syncs your odometer so you never have to enter mileage manually
- Vehicle reports — Generate a clean PDF of your complete service history. Hand it to a buyer, send it to your shop, or keep it for your records
- iCloud sync — Everything stays in sync across your devices. No account to create, no server to trust
Who it’s for
TechSheet is not for people who take their car to Jiffy Lube and forget about it. It’s for:
- Track day drivers who need to know exactly how many heat cycles are on their brake pads and when the last fluid flush was (here’s what to log before and after every track day)
- Weekend wrenchers logging every job they do in the garage — with photos and part numbers
- Multi-car owners managing maintenance across a daily, a project car, and maybe a truck
- Enthusiasts selling a car who want to hand over a complete, professional-looking service history
If you keep a maintenance spreadsheet, a folder of receipts, or a running note on your phone, TechSheet replaces all of that.
Why not a spreadsheet or generic car app?
Spreadsheets work until they don’t. There’s no way to attach a receipt photo, no reminders when service is due, no way to generate a report to hand someone. And most “car maintenance” apps are built for the mass market — they remind you to rotate your tires and call it a day.
TechSheet assumes you know what you’re doing. It doesn’t lecture you about oil change intervals. It gives you a fast, flexible system to log what you did, when you did it, and what it cost — and then reminds you when it’s time to do it again.
The OBD-II support uses your own ELM327 adapter over Bluetooth. No proprietary hardware, no dongle subscription. Plug in the $15 adapter you already have and pull data.
Pricing
TechSheet is free for one vehicle with full functionality — every feature, no paywall on core tools. If you have more than one car or want OBD-II connectivity, TechSheet Pro is $4.99/month or $39.99/year.
Try it
If you’re the kind of person who tracks maintenance because you actually care about keeping your cars right — whether that’s a daily driver, a track car, or a garage full of projects — check out TechSheet.