Are mobile apps for Android and iOS, which you are willing to release later on, going to lack some functions, which the platform itself can provide? Or is it going to be the same thing just in more convenient form for the smartphones?
The apps are planned as an adaptation of desktop frontend, so the final version should indeed have the same functionality. There may be some troubles with custom widget sizes - the authors may set them arbitrarily, so not all widgets will fit on the smartphone screen. We are considering several possible solutions - we'll tell you more about that when the desktop version is done and we're closer to mobile release.
In general, the smartphone screen can hold less information, so, while the functionality is the same, the use cases are different: you may use the smartphone app to quickly check some figures on the go, while the website is your main workplace.