Ci Master Car turns your phone into a professional OBD-II diagnostic tool. Connect to your car through any ELM327-compatible adapter — over Wi-Fi or Bluetooth — and understand exactly what is happening under the hood.
WHY Ci MASTER CAR
• Wi-Fi and Bluetooth support — works with the most common OBD-II adapters on the market
• Read diagnostic trouble codes (DTCs) directly from your vehicle
• Built-in reference database of 245+ fault codes with clear explanations — know what each code means, not just its number
• Clear fault codes after repairs
• Demo mode — explore the full app without any adapter connected
• 100% offline — no internet needed, no account, no sign-up
PRIVATE BY DESIGN
Ci Master Car collects no data. No analytics, no ads, no tracking. Everything — including the complete fault code database — lives on your device. Your car's data never leaves your phone.
GETTING STARTED
1. Plug an ELM327-compatible OBD-II adapter into your car's diagnostic port
2. Connect via Wi-Fi or Bluetooth from the app
3. Read your vehicle's fault codes and their meanings instantly
No adapter yet? Open Demo mode and see everything the app can do.
Built by Crispin Intelligence (Ci™) — Lebanon.
Professional OBD-II car diagnostics over Wi-Fi or Bluetooth. Works 100% offline.