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  2. Chang Keun Jung

Chang Keun Jung

Developer Portfolio

12 App Records
Sound Meter: dB Level Check iOS Icon

Sound Meter: dB Level Check

App Free
  • Version: 1.1
  • Size: 5.21 MB
  • Release date: 2025-06-04
  • Min iOS: 16.6
  • Bundle ID: jayck.iosapp.noise
View App
Chromatic Tuner - Easy Tuner iOS Icon

Chromatic Tuner - Easy Tuner

App Free
  • Version: 1.3
  • Size: 6.16 MB
  • Release date: 2025-05-29
  • Min iOS: 16.6
  • Bundle ID: jayck.iosapp.pitchtuner
View App
Simple Metronome -Beat & Tempo iOS Icon

Simple Metronome -Beat & Tempo

App Free
  • Version: 1.3
  • Size: 8.61 MB
  • Release date: 2025-05-27
  • Min iOS: 16.6
  • Bundle ID: jayck.iosapp.metronome
View App
Simple PDF - PDF Reader iOS Icon

Simple PDF - PDF Reader

App Free
  • Version: 1.9
  • Size: 12.03 MB
  • Release date: 2025-05-27
  • Min iOS: 16.6
  • Bundle ID: jayck.iosapp.pdf
View App
韩语单词 - 免费学韩语 | TOPIK iOS Icon

韩语单词 - 免费学韩语 | TOPIK

App Free
  • Version: 1.5
  • Size: 9.73 MB
  • Release date: 2025-05-21
  • Min iOS: 16.6
  • Bundle ID: jayck.WordLearning-kr-cn
View App
ReadWord-韓国語単語 iOS Icon

ReadWord-韓国語単語

App Free
  • Version: 1.0
  • Size: 9.33 MB
  • Release date: 2025-06-04
  • Min iOS: 16.6
  • Bundle ID: jayck.WordLearning-kr-jp-new
View App
Korean Word Flashcards iOS Icon

Korean Word Flashcards

App Free
  • Version: 1.3
  • Size: 13.73 MB
  • Release date: 2025-05-19
  • Min iOS: 16.6
  • Bundle ID: jayck.WordLearning-kr-en
View App
JLPT Japanese Word Flashcards iOS Icon

JLPT Japanese Word Flashcards

App Free
  • Version: 1.1
  • Size: 10.3 MB
  • Release date: 2025-05-19
  • Min iOS: 16.6
  • Bundle ID: com.jayjung.jpen
View App
JLPT단어장: 일본어 단어 반복학습 iOS Icon

JLPT단어장: 일본어 단어 반복학습

App Free
  • Version: 1.5
  • Size: 19.75 MB
  • Release date: 2025-05-17
  • Min iOS: 16.6
  • Bundle ID: com.jayjung.jpkr
View App
반복영단어 - 토플, 토익, SAT 영단어 학습 iOS Icon

반복영단어 - 토플, 토익, SAT 영단어 학습

App Free
  • Version: 1.4
  • Size: 14.76 MB
  • Release date: 2025-05-17
  • Min iOS: 16.6
  • Bundle ID: com.jayjung.WordLearning2
View App
LED Banner & Concert Sign iOS Icon

LED Banner & Concert Sign

App Free
  • Version: 1.4
  • Size: 29.65 MB
  • Release date: 2025-05-17
  • Min iOS: 16.6
  • Bundle ID: jayck.GlowBoard
View App
Sudoku - Simple Sudoku Game iOS Icon

Sudoku - Simple Sudoku Game

App Free
  • Version: 1.7
  • Size: 5.01 MB
  • Release date: 2025-05-16
  • Min iOS: 16.6
  • Bundle ID: com.jayjung.sudokunow
View App
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