Arabic Spelling Challenge App, created by Yosry Sallal, is an application focused on improving spelling skills. The app is sponsored by the Nahw.com website, and it is the first and most comprehensive spelling app in the world. The application covers all spelling topics, with a particular focus on the areas where grammar intersects with spelling. Each question in the spelling challenge app relates to a grammatical benefit, and a blue exclamation mark appears next to it. By clicking on it, a window opens that sheds light on the grammatical hint in the question so that the user can answer it correctly.

The spelling challenge competitions are divided into 10 questions, 15 questions, 20 questions, and 25 questions, depending on the user's preference. At the end of each competition, the user gets to know their result and receives an evaluation based on specific criteria. The app is suitable for all ages and educational levels, and it provides a valuable benefit to users. Overall, this application is a modest contribution from Yosry Sallal, the founder and director of Nahw.com, to support the neglected branch of Arabic spelling. It is hoped that this app will help Arabic language lovers to improve their spelling skills, and we encourage users to share it with others.