Learn 5 new phonics a day from the red (irregular/difficult) words!
Let your child practice new phonics and review old phonics for 5 minutes a day.
With this app you can use an efficient learning technique called spaced repetition to minimize the time spent learning (see more at https://en.wikipedia.org/wiki/Spaced_repetition).
Every time you know the answer it will increase the review interval, every time you forget it you can review it more often.
There is no learning without remembering.
--Socrates