Stop guessing.
Start diagnosing.
FixitFirst turns your DTCs, mileage, and symptoms into a structured AI diagnostic prompt — ranked by most likely cause, ready to run in ChatGPT, Claude, or Perplexity.
How it works
From case notes to
ranked diagnosis in seconds.
Enter your case notes
DTCs, mileage, symptoms, recent service history — anything you'd write on a clipboard. No special format required.
FixitFirst builds the prompt
The app combines your notes with the vehicle-specific diagnostic pack — year, make, model, engine — into a structured prompt your AI can actually use.
Get ranked hypotheses
Most likely cause first. High / Medium / Low confidence. Specific test steps. No more sifting through generic AI responses.
Marketplace
Every major make
and model.
Vehicle-specific diagnostic packs for Ford, Chevy, Toyota, Honda, Dodge, GMC, Jeep, and more. Each pack is tuned to the exact powertrain — so the AI knows what matters for a 5.3L K2XX vs. a 2.7L EcoBoost.
Built different.
Not a wrapper. Not a prompt library. A real diagnostic workflow.
Bring your own AI
Works with ChatGPT, Claude, and Perplexity. You choose which AI gets the prompt. Your API key, your data.
Ranked hypotheses
High · Medium · Low confidence ratings. Most likely cause first, every time. No scrolling through walls of AI text.
Built-in diagnostic pad
Enter case notes right in the app — no clipboard juggling, no switching between apps to type your prompt.
No data sent to us
Your case notes go directly to your chosen AI. ForgeSights never sees your diagnostic data.
Vehicle-specific packs
The AI knows the difference between a 6.2L and a 5.3L K2XX. Generic prompts get generic answers. Specific packs don't.
30 minutes back per car
"Best $10 I spend every month." Real technicians at independent shops and dealerships. Saves diagnostic time on every complex case.
Used by technicians across independent shops.
"Best $10 I spend every month. Saves me 30 minutes per car on misfire and driveability cases."
"I've tried every prompt template out there. Nothing comes close to how specific the vehicle packs are. P0430 on an F-150 is a completely different diagnosis than on a Silverado."
"The ranked hypotheses feature alone is worth the subscription. I stop second-guessing and start testing."
Simple pricing.
7-day free trial. Full access, no commitment. Cancel any time.
Monthly
$9.99
per month
7-day free trial
Annual · Best Value
$99.99
per year · saves 17%
7-day free trial
Available on iOS. Requires iOS 16 or later.