[Mathpix](https://mathpix.com/) provides software for OKR recognition of handwritten formulas with their [Snip](https://mathpix.com/snip) product. Snips can be converted to [[LaTeX]] for embedding in any [[Markdown]] note. Snip can also read PDFs to extract snippets or convert entire PDF documents. Download the [Snipping Tool](https://mathpix.com/snipping-tool) to read screenshots into LaTeX. Snip can be used as a full-fledged notetaking, storage and retrieval system and is accessible to multiple collaborators (with paid subscription). Try it out for free (up to 10 snips) or subscribe for $4.99 per month for up to 5,000 snips and 500 PDF pages. There's an API but it's priced for enterprise applications. (You can hope that you're favorite e-ink tablet develops an integration!)