Wonderful, but know that it uses a lot of data. – Hiking & Skiing - PeakVisor Review

Update: The developer has explained that the data is necessarily large but that it can be pre-downloaded at home to save data quota. Since that was my only complaint I've upped my rating to 5-stars. Users on a measured plan should understand that the the app will pull a lot of data in the field if it hasn't been previously downloaded. It really is quite amazing at identifying peaks - point and shoot! - and I feel bad about dissing it. But in 3 or so minutes, over a less than 30 degree segment of the horizon, it just blew through my - admittedly low, 100MB - entire monthly data allowance. This won't be a barrier for most people but those light-users on a measured plan, as I am, should know upfront: expect a hefty download to do what it does.
Review by Jrobert.in.Wilton on Hiking & Skiing - PeakVisor.