I would like to include at least a FAQ and maybe some example configurations to ProfileMatic's homepage. But it's always being delayed as when I have time I rather do some programming :P.
No, it's actually for quite different use case. ProfileMatic is for recurring planned occurences. RingingRestorer is meant more for unexpected situations that can't be scheduled. For example, I can't schedule my toilet visits, so RingingRestorer can help there. I can put phone silent during my "private time" in toilet, and be assured that the phone restores ringing mode after a while.
I put RingingRestorer as paid app because I wanted to experiment if it's worthwhile to have paid apps there. Another reason was that I didn't create the application for my own needs (although now that the application has been created, I find it quite useful and am using it), but because another user requested it. I would have liked to get a bit compensation for the time used. I don't intend to charge for ProfileMatic, except by begging for donations. Thanks to all who've donated! It's not a big sum I've gotten that way, but it is nevertheless motivating that there are users who find the application worth while of donations.