xKeyboard - Custom Keyboard

xFormula - Equation Editor

Visual Editing, LaTeX, Word

kSymbol - Symbol Keyboard

Special Character, Unicode

BCalc - a daily calculator

Easy Quick Clear Custom

LoveMusic Player - Local Play

Offline Playback, Lyric Edit

kIPA English - Keyboard

Keyboard for Phonetic Symbols

kChem - Chemistry Keyboard

chemical formula and equation

Bamboo Calculator

Easy Clear Fast Custom