للتدرب على الخط Mashq is a beta version Android app developed by MashqORG, designed to help users learn the art of calligraphy. The app is an electronic panel that simulates a calligraphy pen and provides two main functions: changing the angle through the provided seek-bar and changing the angle immediately by choosing two pointer icons.

The app offers practice sheets that help users study four different calligraphy styles, including Naskh خط النسخ, Ruqa'a الرقعة, Thuluth Jali خط الثلث الجلي, and Nastaleeq نستعليق. Additionally, users can write text in different font styles and capture photos to practice on them.

Overall, للتدرب على الخط Mashq is an excellent app for those who want to learn calligraphy. It's easy to use and provides ample resources for practice. However, as a beta version, there may be some bugs that need to be fixed.