Appareo announced the free Stratus Horizon Pro iOS application just before EAA AirVenture 2018 and demonstrated it at the show. Horizon Pro displays a backup Attitude Heading Reference System (AHRS), offers radio playback capability, and can deliver firmware updates to Stratus receivers. But a coming radio transcription function, currently in beta testing, is the feature that really turned heads.
Source: aopaAppareo launches innovative Stratus app