In the Pro version, you have access to opening moves suggestions and statistics provided with the embedded opening book.In the Pro version, you have access to the evaluation bar.In the Pro version, you can view your recently opened PGNs.In the Pro version, you can receive FEN/game using Share from other apps.In the Pro version, you can filter games using advanced filters in Games Explorer.In the Pro version, you can use advanced PGN edit functions (promote variation, edit tag pairs).In the Pro version, you can record chess games (entire games, partial games, tactics) in PGN format.In the Pro version, you can configure engine options for chess engines that support UCI options (Hash, Threads, Syzygy tablebases etc).In the Pro version, you can set up a position visually.In the Pro version, you can paste PGN file/FEN from clipboard.In the Pro version, you can load PGN files from SD card.In the Pro version, game analysis (either by time or by depth) is not limited.