Hi,
According to the help file, when a word is in the top-most stack and is known, the reserve period will double. This happened to some of the words I am rehearsing, the reserve period went up to 80 days.
However, only 4 days have passed since then and now the reserve period for those words reads 64 days. It seems that each day counts as 4 reserve days in Stackz. I suppose this is a bug?...
Thanks,
Cristian