Tachiyomi is a free and open source manga reader for Android.

Features Include:
• Online reading from sources such as KissManga, MangaFox, and more.
• Local reading of downloaded manga.
• Configurable reader with multiple viewers, reading directions and other settings.
• MyAnimeList, AniList, and Kitsu support.
• Categories to organize your library.
• Light and dark themes.
• Schedule updating your library for new chapters.
• Create backups locally to read offline or to your desired cloud service.