I'm a former Viewranger user. The best feature was that it offered offline maps (not just cached maps!) without any subscription, but this is not available in Outdooractive and feels like a severe downgrade for me. I will dearly miss Viewranger and probably have to look for another app. I also miss the nice tracking overviews like the velocity in the past 15 minutes as graph or deviation from average walking speed. For me it feels ViewRanger had much more customizable features.