Its catalog is organized into sections such as Games, Apps, Topics, News, and Rankings, with categories spanning role-playing, action, strategy, sports, art and design, business, communication, and more. Visitors can browse featured and ranked titles, review app versions and file sizes, and find options across different genres and interests.

The site also publishes gaming and technology news, including updates on upcoming releases, mobile launches, industry developments, and entertainment. Its curated topic pages highlight collections such as strategy, arcade, and action games, alongside wallpaper and social media tools. Examples in the listings include Game Dev Tycoon, Billiards City, and a range of football, basketball, and hockey games. jj4.cc presents itself as a multilingual resource, with navigation options in languages including English, Japanese, Korean, Portuguese, Spanish, German, Russian, and Chinese. Overall, the brand combines APK and app discovery with editorial coverage and themed recommendations to help Android users explore games and applications.