The chess scoresheet app.

Every game, in one book.

Your own games and any PGN you bring. Folders, search and your notes, kept on your phone.

Every opponent, every venue.

Head to head records, results by colour and time control, and the clubs where you played.

Fair at the board.

While you record, the screen shows your moves and nothing else, so an arbiter can check it at a glance.

Ask the arbiter before you use a phone at an event.