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CarSense works with most ELM327-compatible Bluetooth Low Energy (BLE) OBD2 adapters. We've tested extensively with the Veepeak OBDCheck BLE+ (~$40 on Amazon) — our recommended adapter. Other common ELM327 BLE dongles (Vgate iCar Pro, OBDLink) are designed to work too, but the Veepeak is the one we verify against. Note: classic Bluetooth (non-BLE) adapters are not supported on iPhone.

Avoid Bluetooth Classic adapters (older non-BLE dongles) — iOS doesn't expose those to third-party apps without MFi certification.

A few things to check:

• Don't pair the adapter in iOS Settings → Bluetooth. CarSense connects to the BLE service directly. If you previously paired it in Settings, tap "Forget This Device" there first.
• Ignition must be in the "Run" position (or engine running) for the adapter to power on and communicate with the ECU.
• Grant the Bluetooth permission when iOS prompts. If you denied it, enable it in iOS Settings → CarSense → Bluetooth.
• Force-quit and reopen CarSense if scanning hangs.

For each trouble code, the AI explanation includes:

• A plain-English description of what's likely happening on your specific year, make, and model
• Likely causes ranked by probability, each with an industry-aligned cost range
• A severity rating (Safe / Monitor / Urgent / Critical) and driveability guidance
• Any documented manufacturer Technical Service Bulletins (TSBs) that match the code
• Whether the repair is DIY-friendly or shop-recommended
• An overall estimated total cost range

Cost estimates are based on aggregated industry repair data covering 48 of the most common DTCs across 24 popular vehicles, with year-specific anchors where available. They reflect typical US-market pricing and are best understood as ranges, not exact quotes. Independent shops are often 20–30% cheaper than dealer-tier pricing, and rural areas can be lower still. Always get a written quote before authorizing major repairs.

Free includes unlimited OBD2 code reading, the live vehicle dashboard, diagnosis history, and 1 AI diagnosis per month. Most occasional CEL users will be fine on Free.

Pro ($5.99/month or $49.99/year) unlocks 10 AI diagnoses per month, 50 symptom chat messages, unlimited voice diagnostic explanations, and 2 pre-purchase used-car scans per month. Quotas reset on the 1st of each month.

If you subscribed on iOS: open Settings → [Your Name] → Subscriptions on your iPhone, find CarSense, and tap Cancel Subscription. Apple manages all StoreKit subscriptions; we cannot cancel them on your behalf.

If you subscribed on Android: open Google Play → your profile → Payments and subscriptions → Subscriptions, find CarSense, and tap Cancel.

Yes. Open CarSense → Profile → Delete Account. This permanently removes your account, vehicles, scan history, AI conversations, quotes, and reviews from our servers. Note: if you have an active Apple or Google subscription, you must cancel it separately in the platform's subscription settings — deleting your account does not stop the recurring charge.

Code reading and the live dashboard work offline once you're connected to the adapter. The AI diagnosis requires a network connection (Wi-Fi or cellular) because the analysis runs on our servers. If you're somewhere with no signal, run the scan, then re-open the diagnosis later when you have coverage.

Vehicle records (VIN, make/model/year/mileage), DTC scans, and AI conversations are stored on our servers tied to your account so they're available across devices and form the diagnostic history. We do not sell your data, share it with advertisers, or include any third-party tracking SDKs. See our Privacy Policy for full details.

Refunds for App Store subscriptions are handled by Apple — visit reportaproblem.apple.com within 90 days of purchase to request one. For Google Play subscriptions, request a refund through the Google Play Console or contact Google Play support. We're happy to advocate on your behalf if a refund request is denied — email us.