Fltplan.com and their mobile app FltPlan Go.
Works awesome on phones and tablets, and has free Canadian charts. I've been using it for years.
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I make a spreadsheet in Excel with all of my wire numbers in a REALLY small font, bolded, and print it out. I cut the wire number I want, slide it into clear heat shrink (1/8" clear think), slide that on the wire and heat away. I use this on wires down to 22ga. I haven't tried smaller wire as I...