A lot of the difference comes down to CPU.
Different Analyses between Computer and iPad
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Apr 4, 2017
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#3
The quick analysis runs an engine (probably the javascript version of Stockfish 8) very few seconds on each move. In this amount of time, on 1 thread and running the javascript version within the web browser's sandbox, the results are ludicrous. And if you run it on weak hardware, like an iPad or an old PC .... lmao
I guess the only difference of the paid-only analysis options are a bit more time per move. If true, then I have to say that to actually ask money for an analysis service that runs client-side is scammy.
One thing they could do is use Depth as a limit and not time. Then the results would be more reasonable regardless of hardware. It would take a long time on mobile devices though.
I play on my iPad and review my games afterwards. My iPad's analysis often shows inaccuracies or worse, but when I review my game on my computer it shows I played a much better game. It'll turn mistakes into inaccuracies or "good" plays. Also, there is a discrepancy in the value of each move between the two.
Is there to fix this discrepancy? Is there one I should trust more than the other?