Your exam date sets the pace
Tell the app which exam you are sitting and the level you need. It works out how many new words each day has to carry, and moves them when a day is missed instead of letting them pile up.
Words come back before you forget them
Each word returns on a spaced-repetition schedule, so the review you do today is the one your memory needs today, not a fixed list repeated until it stops meaning anything.
Level by level, all six of them
The words follow the National Institute of Korean Language's curriculum levels, so level 3 means the words a level-3 learner is expected to know, and the app shows exactly how far through each level you are.
Free to download. Start with the level you are aiming for.
Download on the App Store