I really enjoyed viewranger it worked brilliantly with my superwalker map. This product however does not even allow me to see the digital superwalker Harvey map I purchased correctly, doesn't show grid reference etc. So not happy about that and I am sure this app will also be a great application, but until it gets to that point they should just retain viewranger and give users the option to use this new app or not, until a point in time when all the features of viewranger are up and running.