Aspectra viewer (app on Google play) is a helper application in the Aspectra system.
One can list, view or delete the saved spectra.
All the saved spectra will be listed in the List-Activity
The folder, where spectra are saved, is defined in Preferences (they are common for the whole Aspectra system).
One spectrum is activated with a click. More spectra can be activated with a long-click
One spectrum or more spectra can be shown in detail view