It's simple, elegant, it works fast, and available on both Mac and Android. I depend on reminders for those tiny pieces of information that I don't want to for

It's simple, elegant, it works fast, and available on both Mac and Android. I depend on reminders for those tiny pieces of information that I don't want to forget, and I need them to jump back at me at a predefined time - so that's what it's going to replace. I have like ~50 items going on at any given moment.