Zerk - Car Maintenance & Fuel

Every machine in your garage in one log. Miles, engine hours, and months - whichever comes first, projected onto real dates. No account, no ads, pay once.

Your driveway has two cars, a mower, and maybe a generator or a motorcycle. The cars might live in a maintenance app. Everything with a pull cord lives in your head - and on the mower, the oil is due by engine hours, not miles.

Zerk is one log for everything in the garage with an engine. It is the tracker that treats hour-based small engines as first-class, right alongside your cars and trucks.

WHICHEVER COMES FIRST Real maintenance is "every 5,000 miles, 50 hours, or 6 months - whichever comes first." Zerk learns how you actually use each machine (miles per day, hours per week) and projects every task onto a real calendar date. "Oil change: about Aug 2, by miles." Meterless machines like a push mower accumulate hours from one-tap session logs after you mow. When data is thin, Zerk says so and asks for one more reading instead of faking precision.

THE ANSWER AT THE PARTS COUNTER The Garage Card is a per-machine specs card built for the store: oil type and capacity, filter part numbers, plug type and gap, belts, tire sizes and pressures, battery group. Big-type mode reads clearly in a basement parts aisle, offline. Every part number you log on a job offers itself back to the card.

PROOF IT PAYS OFF Log a job with the parts you bought and the shop quote you avoided, and watch your lifetime "saved by DIY" total climb. See cost-per-mile and cost-per-hour. When you sell, hand over a clean Service History PDF - full history measurably helps resale.

A PROPER FUEL LOG Full-fill MPG done right, with partial fills handled correctly, in mi/km and US gal, UK gal, or liters. A calm heads-up if a machine's economy trails its own baseline for a while - a hint worth a look, never a diagnosis.

FREE FOREVER 2 machines, unlimited fuel and service logs, the Garage Card, whichever-first projections on 5 tasks, a 60-day analytics window, 20 photos, and per-machine CSV export. Quick logging and projections are never locked.

ZERK PRO

• Unlimited machines and tasks - each with unlimited photos and receipts (free tracks 2 machines, 5 tasks, 20 photos).
• Full analytics history, cost-per-mile and cost-per-hour, and the DIY Savings Ledger of every shop quote you avoided (free shows 60 days).
• Resale-grade Service History PDF per machine (raw per-machine CSV stays free).
• Custom Garage Card sections and global spec search across every machine.
• Calm MPG early-warning flags when economy trails your baseline - a hint, never a diagnosis.
• Home and Lock Screen widgets that show what's due across your garage.
• Seasonal date-anchored task templates and tire/battery age reminders.

Pro is a one-time Lifetime purchase, or a Yearly or Monthly subscription with a 7-day free trial on Yearly. Subscriptions auto-renew unless canceled at least 24 hours before the period ends; manage or cancel in your App Store account settings. Payment is charged to your Apple Account.

YOUR GARAGE, YOUR DATA Your garage's data lives on this iPhone. Open the app and start - no account, no ads. Your machines, locations, and costs stay with you; the app talks to no server and reports no analytics. Intervals and specs are your own editable defaults, set from your machine's manual - Zerk never claims factory numbers.

Designed exclusively for iPhone.

Privacy Policy: https://app-legal-pages.vercel.app/zerk/privacy Terms of Service: https://app-legal-pages.vercel.app/zerk/terms