I've been using google keep and it's been mostly great.* It's free, it's simple and works in multiple platforms: Web, Android, iOS. It supports tags, attachin

I've been using google keep and it's been mostly great.* It's free, it's simple and works in multiple platforms: Web, Android, iOS. It supports tags, attaching images and, archiving notes, so you can keep your list clear. I mostly use a note per idea. Before, when I used a txt/spreadsheet, I mostly had a 1 line per idea kind of organization, but it became impractical when my mind started going back to the same ideas with more thoughts. * it failed on me when it had some sync issues..