An android app to connect to Arduinos and read telemetry data from a connected radio https://www.hopefuloverlook.casa/articles/high-power-rocketry/
This app reads in telemetry data strings from serial connection and uses that info to predict roughly where your kit rocket will land.
Here's a screenshot of a mostly up to date version.
(NOTE: FAKED Coordinates, no live data, not my real location.)
