This app is good for beginners just starting to learn Hangul however, it’s missing consonant vowel combinations for complex vowels (diphthongs), which is kind of a big omission, and the paid version only comes with a couple of examples for each Hangeul letter or letter combination. Because Korean has so many sound changes it would be better to provide more examples so an intermediate learner could create complex syllables and explore how Korean sound change rules apply at the level of both syllables and words.
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