You can make an awful lot of useful little tools with an LLM, vanilla JavaScript, GitHub Pages, and the user's own localStorage as a semi-persistence layer. Two 9s and cross-platform to boot.
Recently I made a diet checklist [1] that I've been following more or less to the letter 5 days out of the week. I have a little Android button that just opens right up to the web page. I click, click, click, then move on with my day. If I feel I need to change something I can copy a plain text screenshot of what's on there currently and chat with Gemini about it.
I'm really liking this new wave of technology.
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