Usagi is a free and open-source manga reader for Android. Usagi's unique features All features from Usagi, include: Added bug fixes for previously existing features in Kotatsu Added some new features that requested by users / community Integrate more new user interface styles (Modern, Classic, etc.) The ability to customize the manga display user interface (style, backdrop, etc.) The accompanying services are regularly updated (Sync server / client, bot, proxy, etc.) Optimized for low-end devices / phones