Apps like Katakana Memorizer

Here are some great alternatives to Katakana Memorizer by Hajime :
Japanese Alphabet- Character
Japanese Alphabet- Character
★4.7
Learn Hiragana Katakana
Learn Hiragana Katakana
★4.3
Kana (Hiragana & Katakana)
Kana (Hiragana & Katakana)
★3.9
Kana Quiz Japanese
Kana Quiz Japanese
★4.5
Kana Draw (Hiragana Katakana)
Kana Draw (Hiragana Katakana)
★4.5
Writing Order Hiragana
Writing Order Hiragana
★3.9
Hiragana Quest
Hiragana Quest
★4.4
Write It! Japanese
Write It! Japanese
★4.7
Obenkyo
Obenkyo
★4.6
Transwhiz Happy Learn Japanese
Transwhiz Happy Learn Japanese
★4.7
Japanese Letter -Learn Hiragan
Japanese Letter -Learn Hiragan
★4.6
Simple Kana
Simple Kana
★4.6
Kana Heroes: Hiragana & Kataka
Kana Heroes: Hiragana & Kataka
★4.8
Japanese Writer
Japanese Writer
★3.5
Katakana - Read and Write
Katakana - Read and Write
★4.3
Japanese characters (PLUS)
Japanese characters (PLUS)
★4.7