Which OBD2 adapters don't work with Odo?

Some adapters pair fine but only exchange data with their maker's own app, so third-party apps like Odo can't read from them. These include OBDLink MX+, BlueDriver, OBDeleven and Carista EVO. Classic Bluetooth ELM327 dongles, often labeled "v1.5 Bluetooth" or sold for Android, also won't work, because iPhone doesn't support classic Bluetooth for third-party accessories. Choose a BLE 4.0 or newer version instead.