Connect and identify
Scan for compatible BLE OBD-II adapters, initialize ELM327 sessions, read VIN, adapter protocol, battery voltage, stored codes, and pending codes.
Live OBD-II diagnostics for iPhone
Know what your vehicle is saying.
Connect to a BLE ELM327-style adapter, watch live engine data, record diagnostic sessions, and review issues with AI-assisted summaries built around real OBD-II readings.
BLE
ELM327 adapters
DTC
stored and pending codes
AI
session review
Live data stream
RPM, speed, coolant, fuel trims, voltage, and selected PIDs.
Features
From adapter connection to a useful diagnostic record.
OBD Diagnostics keeps the workflow focused: connect, read what matters, record the session, then export or review the results.
Live dashboard
Watch RPM, speed, temperatures, pressures, and other selected Mode 01 PIDs with gauges, metric tiles, and rolling graph history.
Recorded sessions
Save drive or idle sessions with timestamped samples, vehicle details, adapter metadata, codes, notes, and location or elevation samples when enabled.
AI-assisted review
Generate diagnostic summaries from recorded session data using Apple on-device models when available or your custom OpenAI-compatible endpoint.
Live Activities and CarPlay
Surface selected dashboard signals on the Lock Screen, Dynamic Island, and a CarPlay live data view when the unlocked features are available.
Export and share
Create session PDFs and share diagnostic records at your request so readings and notes can move with the repair conversation.
Workflow
Built for real adapter work, with a demo path when hardware is not nearby.
Use demo data to learn the app or test a flow, then connect to a real adapter when you are ready. The app includes recovery handling for flaky clone adapters and a graceful disconnect path for cleaner sessions.
01Connect adapter
02Read live PIDs
03Record session
04Review or export
Unlock
Free to start, with an upgrade for enhanced data surfaces.
The app supports an ad-supported build. The Ad Removal purchase removes ads and unlocks enhanced data features such as real CarPlay support, Lock Screen Live Activities, and Dynamic Island data.
Remove Ads + Unlock
Non-consumable purchase managed through the App Store.
Important Notice
Use OBD readings as guidance, not a final repair decision.
OBD Diagnostics is not a certified repair, inspection, emissions-compliance, or safety-certification device.
Confirm diagnostic trouble codes and live readings with appropriate service procedures, especially for safety-critical, emissions, or warranty decisions.
Do not interact with the app in a way that distracts from driving. Use CarPlay and Live Activities only where safe and lawful.
Clearing diagnostic codes may affect readiness monitors or inspection results. Follow applicable local regulations before clearing codes.
Put live OBD-II data in your pocket.
Download OBD Diagnostics for iPhone and turn adapter readings into usable sessions, summaries, and exports.
View on the App Store