Terms of use

Baseline is a read-only diagnostic tool. Using it means you accept these terms, alongside Apple's standard licence terms for apps from the App Store.

Not a substitute for a professional diagnosis

Baseline reports what your car's own control modules say and measures how far each reading sits from the limit the car uses. It does not inspect the car, and it cannot see what the car does not report. It is not a substitute for a professional diagnosis. When the car's own warning light is on, or the car is behaving badly, have it looked at by a qualified technician, whatever Baseline shows.

Estimates are estimates

The trend line and the estimated crossing date are beta features: a line fitted to your own car's drives, with limited data for your model. They are labelled as such wherever they appear. They can be wrong in either direction. Do not defer or undertake a repair on the strength of an estimate alone.

Your responsibility

• Plug in and unplug the adapter, and read the phone, only when the car is parked. Never operate the phone while driving.
• You decide what to do with what Baseline shows. Decisions about driving, repairing or not repairing the car are yours and your technician's.
• Follow your car's own warnings first. A safety instruction in Baseline (for example, to stop and have a misfiring car towed) is fixed wording that repeats manufacturers' general guidance; it does not replace your car's manual or the judgment of a technician on the spot.

Compatibility

Baseline reads CAN OBD-II, the protocol every car sold in the United States from model year 2008 speaks, through the Bluetooth Low Energy adapters it lists. Other cars and adapters may connect but are not supported. Baseline never writes to a car.

The evidence packet

An exported packet is a faithful copy of what the car reported, with the unit scaling defined by the SAE J1979 standard and nothing else. It is offered as documentation, not as a warranty claim, a legal opinion or a repair order.

No warranty

Baseline is provided as is. To the extent permitted by law, its author makes no warranty about its accuracy or fitness for any purpose and accepts no liability for any loss, damage or repair cost arising from its use or from reliance on its estimates.