A standard smartphone generally does not have the SRD860 radio interface used by the direct ADS-L devices currently on the market. It should therefore not be assumed that an app alone offers the same functions as an SRD860 ADS-L device. However, the EASA anticipates that the ADS-L protocol may in the future evolve toward other links, in particular mobile networks — so a distinction must be made between the ADS-L protocol and its actual radio support today.
What a smartphone can do
Some flight apps allow you to share your position via an online tracker network (for example for tracking or safety purposes), relying on a mobile data connection or a Bluetooth gateway to an external device. This is not the same as a direct ADS-L radio transmission, received by other aircraft in real time and without depending on a mobile network.
What a smartphone does not replace
- A dedicated ADS-L radio module, designed to transmit/receive directly between aircraft, without going through a third-party network.
- Battery life and resistance to flight conditions (cold, humidity, vibrations) suited to prolonged aeronautical use.
- Screen readability and ergonomics designed for quick consultation in flight, often with gloves on.
- Direct integration with the rest of the flight equipment (vario, navigation GPS).
Combined solutions
Some manufacturers offer accessories or external modules that connect to a smartphone to add an ADS-L compatible radio function. In this case, it is the external module — not the smartphone alone — that provides the ADS-L function; check precisely the specifications announced by the manufacturer.
In summary
For reliable ADS-L visibility in flight, a dedicated device (standalone or integrated into your instrument) remains the recommended solution. See which ADS-L device to choose for selection criteria.