Please do not uploads many recorded files one after the other : this could bring to problems of mixing wrong form with wrong record due to uploads time. Do your recording, upload corresponding record, do another recording and upload after.
If some folders are empty without any graphs, it may be that the user did not upload any measurement, or deleted the files or uploaded measurements as private.
loudspeakers.audio is the unique online solution, but other answers are available for room and loudspeakers correction : Trinnov is a complete solution of software and hardware, efficient but not cheap Dirac is generally sold with bundled hardware such as MiniDSP Audissey MultEQ is available in some hardware Acourate is a …