The maintenance assistant that
already knows your equipment.
Wrench is backed by a massive library of manufacturer manuals, model-specific specs, parts diagrams and fault codes. Describe the problem — or scan the nameplate — and get safety-first, model-aware fixes. On the web app and native iOS & Android apps your technicians carry into the field.
LIKELY CAUSES: 1) Low refrigerant charge 2) Dirty condenser coil 3) Failing start capacitor
↳ per MCB540 service manual, p.34 — short-cycle troubleshooting
Not a generic chatbot. It reads the manual.
Wrench is grounded in real manufacturer documentation for the equipment you actually run — so answers come with the model number, the spec and the page they're from, not a plausible guess.
Manufacturer manuals
Service, installation and O&M manuals across thousands of makes and models — searched and cited, not summarized away.
Model-specific specs
Capacities, voltages, refrigerant charges, torque values and clearances pulled for the exact model in front of you.
Parts & diagrams
Part numbers, exploded diagrams and compatible replacements — so the next step names the part, not just the problem.
Fault & error codes
Look up a blinking code or panel fault and get the manufacturer's meaning and clear-procedure, in seconds.
Safety-first, always
LOTO, arc-flash, pressurized and confined-space hazards are flagged before the step that needs them — every time.
Learns your history
Add your own notes and past fixes and Wrench weaves them in — the manual, plus what actually worked on your unit.
Ask. Get the manual's answer. Fix it.
No manuals to dig through, no PDF binder in the truck. Open the app, describe what you're seeing, and Wrench does the reading for you.
Tell it what you see
Type the symptom or scan the equipment nameplate in the app. Wrench identifies the make and model and pulls the matching manufacturer documentation.
Get model-aware guidance
Safety callouts first, then ranked likely causes, ordered diagnostic steps and the exact parts — each grounded in the OEM manual and specs for that unit.
Work the fix, ask follow-ups
Keep the conversation going right there — "what's the torque spec?", "which capacitor?" — on the web app or from your phone in the field.
On every screen your team already uses.
Wrench runs as a full web app in any browser and as native iOS and Android apps built for the shop floor and the field — fast, touch-friendly, and installable straight to the home screen.
Scan a nameplate with the camera, ask hands-busy by voice, and keep recent manuals and answers available even when the signal drops in a basement mechanical room.
The assistant, not another CMMS.
Wrench isn't a work-order system you have to migrate to, and it isn't a generic chatbot guessing from the internet. It's a focused assistant grounded in real manufacturer documentation — that works alongside whatever you already run.
Simple plans. Every feature included.
The full assistant, the whole knowledge base, and all the apps on every plan. Start free — no credit card required.
Starter
For a small crew: the full assistant, manufacturer knowledge base and mobile apps with a modest monthly cap.
- 2,000 assistant questions / mo
- 10 team seats
- Full manufacturer knowledge base
- Web, iOS & Android apps
- Developer API access included
Pro
For a busy maintenance team: a high monthly question cap across web and mobile.
- 10,000 assistant questions / mo
- 50 team seats
- Full manufacturer knowledge base
- Web, iOS & Android apps
- Developer API access included
Unlimited
No monthly question cap. One flat rate for the whole operation.
- Unlimited assistant questions
- Unlimited team seats
- Full manufacturer knowledge base
- Web, iOS & Android apps
- Developer API access included
Prices shown billed annually · See monthly pricing & full comparison →
Built for the people who keep equipment running.
From the tech on the floor to the manager who has to keep the whole site up.
Technicians & field crews
The manual in your pocket. Scan a nameplate, describe the fault, and get the make-and-model answer — without carrying a shelf of binders.
- Nameplate scan & instant model match
- Safety callouts before every risky step
- Exact part numbers and torque specs
- Works on your phone, even offline
Maintenance & facility managers
Level up a whole team's diagnostic skill overnight. New techs get expert-grade, manufacturer-backed guidance from day one.
- Consistent, safety-first procedures
- Faster fixes, less repeat downtime
- Add your own notes & past fixes
- Roll it out on web and mobile in minutes
Built by a small team that lives in the same operations you run.
Wrench is made by Good Dog Labs, a small, independent software group in San Diego building focused tools for maintenance and facility operations.
Wrench is that idea, distilled: the manufacturer's manual and the tech's hard-won experience, in an assistant that fits in a pocket.
Put the manual in every pocket.
Full access to the assistant and the whole knowledge base. No credit card. Cancel anytime. On web, iOS and Android in minutes.