My Little Word Land now has a setting to adjust the amount of time before a word is ready to be reviewed.
By default, words are ready to be reviewed when more time has passed than 1.5 x time-successfully-remembered
. For example, if we learn a word and then review it 4 hours later, then we've successfully remembered the word for 4 hours. The word will then be ready to be reviewed again when 6 more hours have passed, because 4 x 1.5 = 6.
The new setting lets you change the multiplier from 1.5 to a different amount. For example, if you set the multiplier to 2, then words will be ready to to be reviewed when more time has passed than 2 x time-successfully-remembered
. For example, if we've already remembered a word for 4 hours, then the word will be ready to be reviewed again when 8 more hours have passed, because 4 x 2 = 8.
This setting is shown as "Review time multiplier" on your account page:

Thanks to @taubercat for prompting me to add this setting via our discussion in this thread! 🙂