Each piece is worth the price by itself – Electronic Toolbox Pro Review

I have to agree with the other reviewers. I very recently purchased this app and have not even been thru most of it. But the Arduino part alone is worth the money. Sure there are other resistor color band calculators. But this one is right here with your other tools. To have the formula presented as well as the value of resistor for LEDs is great. And if that is not enough there is section just for formulas. For someone like me just getting back into electronics this is amazingly handy to have in my hand. And I can see it won’t be less so once I gain more experience. Thanks.
Review by CharlezH on Electronic Toolbox Pro.