First, I'm loving the radiacode and app. It's a fun way to add to outdoor adventures, long drives. It's sensitive enough you can tell what rock types you're walking or even driving over. I've used it to detect almost forgotten Goldfields while driving through mountain areas. Just one minor suggestion. When you switch to the map option, could you put a dot on your current location before you turn on the record option? That way people can more easily continue maps where they left off. Thanks!