The 14 basic consonants
Every syllable block in Hangul begins with a consonant. In Korean, each consonant has a traditional name that begins and ends with its sound.
Between the "g" in "go" and the "k" in "skin".
Like the "n" in "nose".
Between the "d" in "door" and the "t" in "star".
A light tap like the "tt" in "butter", or "l" at the end of a syllable.
Like the "m" in "moon".
Between the "b" in "bed" and the "p" in "spin".
Soft "s" as in "sea" or "sun".
Silent as the initial consonant; "ng" as in "song" as the final.
Between "j" in "jump" and "ch" in "chill".
Strong "ch" as in "cheese" with a burst of air.
Aspirated "k" with a strong puff of air, as in "kite".
Aspirated "t" with a strong puff of air, as in "top".
Aspirated "p" with a puff of air, as in "park".
Like the "h" in "hat".
Letter names vs. syllable sounds
In English, the letter B is named "bee", but sounds like /b/. Similarly in Korean, ㄱ is named giyeok (기역). The first syllable of its name shows the sound it makes at the start of a block (g), and the second syllable shows the sound it makes at the end of a block (k).
Hangulmate starts by focusing on the starting sounds so you can read syllables immediately.