The few analytics Fiori Apps you could find on S4 Hana can't compete with the tools you could find on the BI suite (webi, design studio, analysis, lumira etc.) ; either in term of user experience or simplicity of implementation.
By the way, this tools can be plugged on top of your S4/Hana thus allowing realtime reporting with all the functionalities of these different tools.
Regards,
Frederic