I launched my web-based notepad calculator, https://numpad.io/, a few years ago.
Right now I'm working on a version 2 that has user accounts, multiple documents, markdown support, and document exports. Everything is local-first and it uses CRDTs to sync documents.
It looks like this: https://i.imgur.com/Plk1DQ4.png the calculator is mostly the same for now, with a few improvements. It's unstable right now, so I don't want to publicise the dev url, but if you'd like to become a beta tester email me at contact@numpad.io
When I launched a lot of people asked for an Obsidian plugin too. I'm not averse to the idea, but I'm trying to turn it into a business, and those models seem tough to make any money from.
It's not showing in the screenshot because the numbers in the doc have different units, but it does do that https://imgur.com/a/SusFZDh (bottom right hand corner).
Right now I'm working on a version 2 that has user accounts, multiple documents, markdown support, and document exports. Everything is local-first and it uses CRDTs to sync documents.
It looks like this: https://i.imgur.com/Plk1DQ4.png the calculator is mostly the same for now, with a few improvements. It's unstable right now, so I don't want to publicise the dev url, but if you'd like to become a beta tester email me at contact@numpad.io