Aether does not ship a 10-million-game file to your laptop. Master search uses the Lichess explorer API (player, year, rating, position). Your own games stay in My Games with tags and folders.
Reading your openings…
Position, ECO, rating, year, player. Win/draw/loss and average rating per move.
Search, folders, tags, favorites, auto-org (wins/losses/messy/clean), export PGN.
Switch the explorer to “My games” — repertoire, deviations, loss spots.
Pull Chess.com / Lichess archives, then review. Analysis stays on-device.