Your car manual,
but it talks back
Otto reads your 500-page manual so you don't have to. Ask anything about maintenance, diagnostics, or costs and get answers sourced directly from your car's official documentation.
Meet Otto
Otto knows your car
Instant Diagnostics
200+ codesPlug in your OBD-II scanner and get plain-English explanations of every code and sensor
Your Car's Memory
Full historyMaintenance plans, service records & reminders — Otto never forgets
Save Money
Avg $1,200Know the real cost before visiting the dealer
What do you drive?
Pick your brand and model below
You're All Set!
Your personal GLK expert is
ready to help anytime
You shouldn't need a $150/hr mechanic to understand your own car
Every car comes with a manual nobody reads. When something goes wrong, you're stuck googling symptoms, scrolling forums full of guesses, and hoping the dealer isn't overcharging you. Otto changes that. Ask a question, get a real answer, sourced from your vehicle's official documentation.
Three taps to answers
Tell Otto what you drive
Pick your brand and model. Otto loads the exact manual, service bulletins, and technical docs for your specific car.
Ask like you'd ask a mechanic
- "Why is my engine light on?"
- "What oil do I need?"
- "How much should brakes cost?"
Get answers with receipts
Every answer cites official manufacturer documentation. Share with your mechanic, export to PDF, or bookmark for later.
Otto vs. the alternatives
There are other ways to find car info. None of them do what Otto does.
vs. ChatGPT
Generic AI gives generic answers. Otto is trained on your car's specific manual, not the internet. Ask about your 2012 GLK's transmission and get the exact fluid spec, not a Wikipedia summary.
vs. Forums
Forum advice: "I think it might be the alternator." Otto: "P0301 is a cylinder 1 misfire. Common causes for your X204: worn spark plugs, faulty ignition coil, or clogged fuel injector. Here's the diagnostic sequence..."
vs. Your Manual
The answer is on page 347. Otto has it in 3 seconds. Same official information, delivered in plain English, with follow-up questions welcome.
Everything you need. Nothing you don't.
Ask anything
Engine, transmission, brakes, electronics, maintenance schedules, warning lights. If it's in the manual, Otto knows it.
Your whole garage
Multiple cars, one app. Otto remembers each vehicle's history and tailors every recommendation to that specific car.
AI Maintenance Checkup New
Tell Otto your mileage. Get a prioritized maintenance plan based on your car's service intervals and driving history.
Know the real cost
Dealer vs. independent shop vs. DIY. Otto breaks down parts and labor so you never overpay again.
Export to PDF New
Print a professional report with full citations. Hand it to your mechanic or keep it for your records.
15+ brands. One app.
Mercedes, BMW, Audi, Toyota, Honda, Ford, and more. Each one backed by that manufacturer's official documentation.
Real questions. Real answers.
Maintenance
You: "What oil does my 2012 GLK need?"
Otto: Your 3.5L V6 requires synthetic oil meeting MB spec 229.5. Recommended: 0W-40 synthetic. Capacity: 8.5 quarts with filter. Drain plug torque: 25 Nm.
Diagnostics
You: "Check engine light just came on. Code P0301."
Otto: P0301 = cylinder 1 misfire. For your X204, the most common cause is a failed ignition coil ($45 part, 20-min DIY). Check spark plug gap first, should be 0.032". Here's the step-by-step...
Cost savings
You: "How much should a brake job cost on my GLK?"
Otto: Front pads + rotors for your X204: Dealer ~$850, independent shop ~$450, DIY ~$180 (parts from FCP Euro with lifetime warranty). Here's the full breakdown...
Free. Not freemium. Free.
10 questions a day. Every feature included. No trial. No credit card. No catch.
Free
$0/forever
- ✓ 10 questions per day
- ✓ Every feature included
- ✓ Unlimited conversations
- ✓ No credit card. Ever.
Personal
$4.99/month
- 20 questions per day
- Everything in Free
- Support the dev team
Annual: $39.99/year (save 33%)
Garage
$14.99/month
- 100 questions per day
- Built for mechanics
- Workshop-ready
Annual: $119.99/year (save 33%)
Why charge at all? AI costs ~$0.03 per answer. Paid tiers keep the free tier free for everyone.
Questions about Otto
Which cars does Otto support?
15+ brands: Mercedes, BMW, Audi, VW, Toyota, Honda, Ford, Chevy, and more. Each agent is trained on that specific manufacturer's official service documentation, not internet scraping.
Where do the answers come from?
Official manufacturer manuals, technical service bulletins, and OEM documentation. The same sources your dealer uses. Every answer includes citations you can verify.
Is it actually free?
Yes. 10 questions per day, every feature, no trial, no credit card. Paid tiers exist for people who want more capacity or want to support development. The free tier isn't going anywhere.
Can I trust the answers?
Otto cites official sources with every answer. But it's an informational tool, not a diagnostic tool. For safety-critical repairs, always verify with a qualified mechanic. Otto helps you ask better questions when you get there.
What about privacy?
Conversations stay on your device. No account required. No personal data collected. Anonymous analytics only. Read our full privacy policy. It's refreshingly short.
Do I need an account?
No. Download and start asking. Optional account lets you sync across devices and back up your data, but it's never required.
Your next check engine light doesn't have to be scary
50,000+ car owners already use Otto. Download free. Your first answer is 30 seconds away.
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