A battery calculator App ( iPhone/Android)! for eBikes would be useful. Perhaps one exists. I would love to know how long I can expect to travel ( range) by plugging in some variables ( voltage, ah, pedal assist level, speed average). I am new to eBiking but have some basic understanding of batteries usage from having drones also from using my Goal Zero Yeti 400 and Solar panel when dry camping with my Aliner Scout. I know I would gladly pay for a phone app that helped me figure range. I don't use throttle and actually use zero motor if on flat ground. Contrary to what I had read the Ecotric 26" Fattie pedals fine as a bike on paved flat or mild rollers. Any thoughts?