Famous chess game apps

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Any recommendations for apps with truly comprehensive chess game databases?  I bought chessDB many years ago and frequently find that specific games aren't there.  And I'm searching for games between well known folks like Kasparov, Nimzowitsch, Lasker, Tal, Benko, etc.

Zauren

I second this, I've been having to recreate games on my chess app and it's getting tedious, especially since they are never saved.