হতাশ হবেন না (Hotash Hoben Na) is a free Android application developed by WS Apps under the Education & Reference category. It is an e-book that features the work of Dr. Ayed Abdullah Al-Qarni, a renowned scholar from the Arab world. Dr. Al-Qarni is a poet, writer, outstanding speaker, researcher, and popular author, whose writings have gained worldwide recognition.

This book, which has already sold over thirty million copies, has been translated into Bengali by Maulana Abu Boshra and has received immense popularity in Bangladesh. It is an inspirational book that aims to motivate readers to overcome despair and find hope in the mercy of Allah. The book encourages readers to keep faith in Allah and to strive for a better future, even in the face of adversity.