Ask HN: Any FOSS Android apps allowing GPS path retrace?

Hi all, I've been hiking in areas with many trail splits and low/missing signage recently and my phone & ham radio GPS has been handy. However the app I'm using doesn't seem to have a path-retracing feature, which would be really nice since lots of trails lead back, but only some are not "dramatic" trails. I'm looking for a FOSS Android app solution if possible. Any recommendations appreciated.