This app provides a track navigation feature mainly for the Forerunner 230/235 devices, where the track is prepared and transmitted to the device by an Android companion app.
Installation sources:
ConnectIQ: https://apps.garmin.com/de-DE/apps/07c0363a-a921-4c77-bb4f-93a6d6c4a2ed
Android app: https://play.google.com/store/apps/details?id=org.andan.android.connectiq.wormnav
User guide: https://andan67.github.io/wormnav/
The ConnectIQ and the Android companion app are free and open source software (https://github.com/andan67/wormnav).
Questions/feedback are welcome.