Anyone knows how precise is Reatune in cents?

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I mostly use Reatune to tune my string instruments and it`s pretty cool but when I got a 5 string bass and a baritone guitar Reatune seemed to dislike`em as it`s digital "needle" jumps like crazy making tuning process slightly complicated. Think about getting Peterson software or maybe smth else, just wanna make sure that would be a huge improvement, so I need to know Reatune accuracy in cents to compare