i was wondering for quite a while when the chart is starting to show what the numbers tell you. but no chart on my iphone 5s or ipad.... today i thougt maybe it is related to the german language setting of my ios devices, so fo a test i switched my iPad to english... and voila the active calorie chart shows up. So there must be a bug related to the localisation.
This is a known issue with the application, and the developers are working to resolve it and correct it in a future update. At this time, I am unable to provide a specific date, but we believe it will be resolved with the next major update. Please be sure to keep an eye on the app store for application updates. We apologize for the inconvenience.