Streak Rescue allows you to keep your streak alive, even if you miss a day of learning.
You can maintain a perfect streak with Rescues if you don't miss more than one day in a row.
If you are a Free learner, you are given 1 Rescue and if you miss more than one day in a row, you will loose your streak.
If you are a Premium learner you are given the chance to earn more Rescues and you will have to learn 5 days in a row to earn one Rescue, accumulating up to 4 Rescues for longer breaks, allowing you to miss up to 4 days before loosing your streak.
The Rescues you have earned are automatically applied to your streak on the days you don't learn with Drops.
Updated