The "گام به گام یازدهم رشته تجربی" app is an Android-based education and reference app for 11th-grade science students. The app is designed by Arvel Apps and is completely free of charge, with no internet connection required. The app covers all the courses in the 11th-grade science curriculum, including Mathematics, Physics, Chemistry, Biology, Laboratory Science, Persian, Writing, English Language, Arabic, Quranic Language, Religion and Life, Geology, Contemporary Iranian History, and Human and Environment.

The app has several features that make it an excellent study tool for students. It has a page-flipping mode, an automatic bookmark feature to save the last page read, a zoom-in feature, a night mode, and an option to change the background color. The app is compatible with all Android 4 and later devices and has a user-friendly interface that is easy to navigate.