Duy Leo Apps

Sim feng shui applications or extreme view, complete and absoluteprecision

Tool for anyone who works in the Construction Industry

This application calculates the volume of concrete with a varietyof foundation

A simple tool for interpolating,extrapolating(1D and 2D) andconvert unit

Learn everything Chinese in one

Using intelligent algorithms to Steel cutting optimization

Korean through Sino-Kanji

Application to guide and practice writing Chinese characters

Decomposition of Chinese characters into Radicals

HSK and TOCFL exam preparation

English dictionary, grammar, TOEIC, IELTS exam preparation

TOPIK exam preparation, grammar, vocabulary

Top Korean dictionary, complete, accurate, compact, easy to use

JLPT and NAT exam preparation with clear detailed explanations