90% may not be good enough if you use it for mushrooms. The ones I use give a percentage on how sure they are. But they cost 20 bucks a year.Like above- you can use an App for this. The one I prefer is from NatGeo called "SEEK". It's incredible... I like IDing things on my own, but this app is totally free and works amazing about 90% of the time. It also shows you a map around you where that species is.
Seek also can ID insects, animals, mushrooms... basically anything.
even with those check books and other mushroom people before popping one in your mouth. Or offer them to your spouse first….