// for every car owner
Your car's history lives in too many places.
The service receipt in the glovebox. The mileage scribbled in your phone notes. The reminder you set and ignored. Wrench puts your car's full history in one place.
The old way
Engine Oil 5W30..KSh 3,500
Labour...........KSh 1,500
TOTAL............KSh 5,000
14/03/25
NTSA expired
— KSh 10,000
~130k kms maybe
Tyres x2........KSh 18,000
Fitting..........KSh 2,000
02/11/24
CERTIFICATE
Expiry: 09/01/25
Your insurance is expires in 3 weeks. Also, that note about brakes at 130K? You're at 132,400 now. Worth checking both at the same visit.
// for every car builder
You should not need five browser tabs to fix your own car.
The forum thread from 2019. The YouTube video that skips the part you need. Wrench gives you an AI crew chief who already knows your specific build.
coilover top mount - 35nm? CHECK THIS
ask on discord
3rd part ordered, still guessing
350zfanatic: no its plugs 100%
boostednissan: could be injectors tbh
BC Coilovers...KSh 105,000
Shipping.........KSh 5,000
With your JWT intake and Stage 2 tune, misfires above 12psi are almost always MAF calibration. But you're at 87K and haven't logged new plugs since the tune — VQ35s are sensitive here. Start with plugs before spending more on parts.
// what wrench does
Every modification, logged.
The parts, the cost, the date, the photo. Your car's full history, not your memory of it.
Every build stage, tracked.
Plan the work. Track the costs. Know exactly what is done and what is next.
Every service record, in one place.
Oil changes, brake flushes, tyre rotations. Never wonder when something was last done.
// MEET REX
It already knows your car.
Rex is your AI crew chief. It knows your car's specific build, and it knows how to help you get the work done.
Hover over Rex. Click to hear what he is thinking.
Rex knows when your last oil change was.
Rex noticed your Stage 2 has stalled.
Rex has opinions about your build order.
Early access. Limited availability.
1,240 builders already on the list.
"Finally something that knows my build isn't stock."
"Rex caught a service I'd completely forgotten."
Free to start. No credit card. No spam.