I use Simplenote[0] for this since I always get random creative ideas and thoughts throughout the day; SN being cross-platform allows me to jot them down mostly on my phone and then reorganize/expand later on the desktop client.
It's also open source, and from a company that won't go bankrupt anytime soon.
It's also open source, and from a company that won't go bankrupt anytime soon.
[0] https://simplenote.com