FujiGoban Free is an Android application that allows you to view and edit Go(囲碁)/Baduk(바둑)/Weiqi(围棋,圍棋) game records (kifu). It is a free ad-version of FujiGoban Pro and has all the same features except for the ads. The app lets you open sgf/ngf/ugf/gib files, paste sgf data from the clipboard, and record/edit sgf files.

You can play human vs human board games but there is no 'human vs CPU' feature. The app also has an undo feature that lets you undo your moves up to 30 times. You can add move numbers, comments, game information, markups, and variations to your games. Other features include a screenshot option, backup and restore functionality for sgf files, and the ability to open sgf files attached in G-Mail. You can also open sgf files in cloud storage like Google Drive, share sgf as text/file, and customize preferences such as coordinates, board color, lines, default folder, and more. The app has English menus and requires the INTERNET permission to download sgf data and WRITE_EXTERNAL_STORAGE permission to save/delete sgf files.