This application is 'Hunminjungum Keypad [Old Hangul]' tthat provides the input of Old Hangul. And this app is the first app that allows input of Old Hangul on mobile, aiming for the easy use and globalization of Old Hangul.

The Old Hangul has been used for hundreds of years after King Sejong the Great created 훈민ㅈㅕㅇㆆㅡㅁ(Hunminjeongeum), but in modern Korean society, it has not been used in the life of the public for decades and is forgotten …

However, many people, with enthusiasm, worked hard to restore the Old Hangul to digital, and through these efforts, the Old Hangul Standard was established in Unicode. And several Old Hangul applications were developed to implement this standard.

This application fully supports the Unicode Old Hangul Standard, and the form of keypad provided by the app was designed just as the principle of Hunminjungum so that people can easily come up to Old Hangul.

Now the Old Hangul is ready to return to our daily life. Do you want to try Old Hangul? Then let's get started.

癸亥冬我殿下創制正音二十八字 - p62, l4
(In the winter of the year of Gyehae, Our Majesty created the twenty-eight letters of Jeongeum)
略揭例義以示之名曰訓民正音. - p62, l5
(He showed it by giving a concise example and meaning, and named it 'Hunminjeongeum'.)
:
以二十八字而轉換無窮簡而要精而通. - p63, l1
(With just twenty-eight letters it rotates and has no end, simple and useful, detailed and widely communicated.)
故智者不終朝而? 愚者可浹旬而學. - p63, l2
(Therefore a wise person understands it even if the morning is not over, and a foolish person learns it in about ten days.)
以是解書可以知其義. - p63, l3
(If solving the writing with this, one gets to know the meaning.)
以是聽訟可以得其情. - p63, l4
(If listening to a fight with this, one comes to understand the situation.)
:
無所用而不備無所往而不達. - p63, l6
(No lack of equipment in what you use, No failure to reach where you go.)
雖風聲鶴唳鷄鳴狗吠皆可得而書矣. - p63, l7
(Much more, the sound of the wind, the cry of a crane, the cry of a rooster, and the barking of a dog all can be gotten and written down.)
遂命詳加解釋以喩諸人. - p63, l8
(At last He commanded to add detailed explanation and make everyone aware.)

■ Hunminjungum Keypad
The consonants of Hunminjungum include molar sounds (ㆁ, ㄱ, ㄲ, ㅋ) modeled after the shape of the tongue root blocking the throat, tongue sounds (ㄴ, ㄷ, ㄸ, ㅌ) modeled after the shape of the tongue clings to the upper gums, lips sounds (ㅁ, ㅂ, ㅃ, ㅍ) modeled after the shape of the mouth, teeth sounds (ㅅ, ㅆ, ㅈ, ㅉ, ㅊ) modeled after the shape of teeth, throat sounds (ㅇ, ㆆ, ㅎ, ㆅ) modeled after the shape of the throat, and semi-tongue sound (ㄹ) and semi-teeth sound (ㅿ). There are a total of 23 basic alphabets. Compound consonants are made by combining these letters. The vowels have 11 basic alphabets that are ㆍ, modeled after the round sky, ㅡ, modeled after the flat ground, and ㅣ, modeled after a standing man, and ㅗ, ㅏ, ㅜ, ㅓ, ㅛ, ㅑ, ㅠ, ㅕ made by combining these three letters. Compound vowels are made by combining these letters. When a consonant and a vowel are combined to form a new letter, the vowel is located below and to the right of the consonant. The overall shape of the Hunminjungum keypad has consonants and vowels arranged like this.

■ Input mode
In the input mode that determines the range of letters to be input, there are Hunminjungum mode, which allows input of Hangul and Old Hangul, and Hangul mode, which allows input of Hangul. If you select an input mode, the keypad layout changes according to that mode.

■ Array type
Two layout types are provided in Hunminjungum mode and Hangul mode: A standard type with all the letter buttons for consonants and vowels displayed, and a simple type in which stroked letters are hidden around the starting (representative) letters of consonant.

■ Language support
Korean, English