I was looking for a long time for an effect, that could easily spread vocals recorded in mono and it seems, that I found one.
I don't tell you, that SLVR Spreader is the best stereo expander or enhancer and works great with any situation, but in this price range has no competition (intro price is only 14$).
Mildon also earlier released Vocal Spread (3$), but SLVR Spreader is much much better.
There's no manual included in .zip file (maybe would be useful for someone) but I think, that you don't need it.
GUI is nice, clean and looks like "older brothers" from Provoc Series Bundle. There are three modes for widening the signal. I will mostly use "Delay mode" for vocals but there's also "Wide mode" for group tracks or mastering and "Shuffle mode". On the left side you can see channel meters showing amount of widening to the signal.