In two weeks I'm going on a 3 day hike averaging 10-15 miles a day on a section of the AT. I have an iPad Mini with LTE and a Wahoo Fitness BT heart rate monitor. I typically use the heartrate strap with my iPhone when working out. But for the hike, my plan is to pair the HR strap with the Mini and put the mini in the top of my pack with GPS enabled, but wifi and LTE/4G/3G off to maximize battery life. Basically, I want the app to use the GPS to track my trek, but also to get accurate heart rate readings so I can also calculate calorie burn (NOTE: I can do this w/o the HR strap, but there's no good way of calculating calorie burn when factoring in temperature, elevation change, and the weight of the pack... which changes as I consume water and food... so a heart rate strap is best). Basically, I'm looking for the best app to handle this. I have the Wahoo Fitness and RunKeeper apps on my iPhone, but both are iPhone apps. Neither are optimized for the iPad or iPad Mini. Runkeeper has the most options... Wahoo Fitness only allows for running or walking, not hiking. Runkeeper allows me to choose hiking and it works well when in GPS only mode as it will add the maps data in later when it has data coverage later. But as noted, its not iPad optimized... its an iPhone app that is super-sized to work on the Mini. So... does anyone know of a good (preferably free) app that can run in a GPS only mode but add mapping data in later... can support a BT heart rate strap... and that is iPad/iPad Mini optimized?