I was thinking that we could add mastery for review words. What I mean is that for each new word you learn, it has a “strength” applied to it, like: weak, okay, good, amazing, mastered. When people get one of the review words right in the daily challenge, a mastery level goes up. It doesn’t have to go from weak to okay in one correct answer, but a progressive amount of them. If someone gets a word incorrect in daily challenge or swipes “don’t know” the mastery level could go down. You could check your mastery for each word you learned in “review words” and there could possibly be a small test there to improve mastery. Maybe fully mastered words could have a different colour like gold or silver when they appear in the reading or in daily lessons. This could be added after with the widgets after all the other big updates which need to be done inshallah
