Katakana Pro
Gerson Luca
Kana (Hiragana & Katakana)
Jerry Studio XYZ
Katakana for Beginner
Nahu Studio
Just Kana - Hiragana Katakana
Planing Lab
Kana Game: Hiragana & Katakana
Kazzuyak
Katakana Memory Hint [English]
The Japan Foundation
Katakana Memory Hint [Thai]
Kana App - Katakana & Hiragana
Fyodor Chebnev
Dr. Moku's Hiragana & Katakana
Dr. Moku
Fun! Katakana
Rainbow Mimizu