Is there an Android app to view Infoslips .ifs files?
Yes, there is a version of the application for Android that can open the IFS files. You just have to store those files on the Android's storage partition (Internal or External). Install the application through the application's page at Google Play and open it. Browse to where the files are stored and then you should be able to open those files.
Doesn't work. Says I must sign up my email address and when I do it says it can't find any slips associated with this email address.