Write it! will teach you the basic scripts of several different languages, using audio by native speakers to familiarize you with proper pronunciation. You can first practice learning to write a small set of characters, then you can test yourself through answering multiple-choice questions and more writing exercises.
Although the interface is less flashy than Write Me, Write It! may be a better option for Korean learners because you will learn how to write Hangul from the start. Similar to Write Me and Scripts by Drops, Write It! doesn’t seem to give much background about each script. However, the creators of Write It! also developed Infinite, which you can use for free to learn and practice beginner words that use your chosen alphabet.
You can test out Write it! (free), Write Me (paid lifetime access), and Scripts by Drops (monthly or lifetime access) to see which app best suits the language you are learning. For more comprehensive apps, check out Eggbun for Korean or Skritter for Chinese and Japanese.