Use APKPure App
Get FSKAREN キーボードスキン 【プリティ】 old version APK for Android
This is a keyboard skin that can be used in FSKAREN for Android Ver3.1.0 later.
FSKAREN for Android
https://play.google.com/store/apps/details?id=jp.co.fsi.fskaren.dl&hl=ja
This is a keyboard skin that can be used in.
[How to use]
After installing this application, please select [Settings] → [redesign] → [Pretty] from the keyboard of FSKAREN.