Its catalog includes popular mobile games as well as practical tools for tasks such as document management, media playback, and photo or video editing. The platform organizes listings with brief descriptions and system requirements, and says it regularly updates its catalog with newer app versions.

Users can search for software, download APK files, create accounts, save favorites, and review download histories. v21 also promotes a mobile app, fast downloads, a user-friendly interface, recommendations based on popular categories, and alternative access links. The site states that files are scanned for malware and that official developer signatures are verified. Its Android app listing specifies version 2.1.0, a 28.5 MB file size, Android 5.0 or later, and a May 20, 2024 update date. Customer support is described as available through live chat, email, and a contact form.