Sam, I assume that you don’t condone chillul Shabbos for even an hour.
The developers of this app will have to give huge din v’cheshbon if they go through with this. Besides for not making anything muttar, they are fooling people into thinking they are making it muttar by inventing issurim which this app supposedly takes care of.
And no, Sam, emphatically NO, it would not be okay even if they somehow took care of the technical issurim.
http://www.hebrewbooks.org/pdfpager.aspx?req=14336&st=&pgnum=158&hilite=