iOS / Mac: there is definitely no shortage of note apps out there, but Bear is an app that manages to distinguish between a few different popular styles and might be right for you if you need more features than the plain text offerings, but not as much as something like Evernote.
Functionally, Bear looks a lot like the recently invigorated Apple Notes. You organize the notes in Bear using hashtags, you can pin notes to the top of your list, and it supports inline images. Bear is also aimed at coders with a markup editor that supports a number of different programming languages. Overall, Bear supports basic markdown to format text, but can also automatically format items such as links and addresses. There is even a whole system to link notes together.
What makes Bear a little different is its ability to function as a long writing tool as well. It has a focus mode that hides all the material and just gives you a text editor to write with, and it supports exporting to PDF, HTML, and DOC when you’re done. Because of this, he manages to work both for jotting down quick ideas or to-dos, or for doing more complicated writing.
Bear is free on Mac or iOS, but if you want to sync your devices, you’ll have to shell out $ 14.99 / year for a subscription. Still, the fact that you can check it out without paying anything is worth a look if you need something more than Apple Notes, but don’t want to do it all with something like OneNote or Evernote.
Bear (Free / subscription)