I'm just starting to look into this. I just discovered that I can export my games with Dr. Wolf to a text file for a single game. I'm not sure how to interpret what the software might tell me with it's numbers. Are there any free analyzers that actually indicate on the board where the error was made? With my Dr. Wolf subscription, it reviews the game I just played and random positions from my previoius games. Not sure how this compares to using Lichess analyzer.