Hello World,
My mom's a textile designer, contracting with large companies, but somehow not getting to use any fancy tools they. She says design software existd, but it's pretty expensive.
At the core, she's making plaids - a black-and-white pattern (2d grid) corresponding to vertical and horizontal threads being above one another, and color schemes (2 arrays) for the vertical / horizontal strings (in most cases, does not match the size of the grid).
So she made her own monstrocity of a pipeline, with Photoshop, Plaid Maker (a rather old web app, https://www.plaidmaker.com/), screenshots, Excel (for designing stuff - yes!), and an old Soviet-era MS-DOS designer program (in Russian, of course).
Throughout uni, I was jokingly saying I'd build a better Plaid Maker for her, even if the web is not my area of work. After The Great Resignation I figured, why not?
Lots and lots of back-and-forth later, here's the outcome: https://plaid-designer.vercel.app/
Note: not for mobile, but should work on a tablet.
Privacy: no analytics are used, but it does rely on Google Firebase for authentication and auto-saving of your designs. Log in to keep them permanently; otherwise, they're saved on an anonymous account, cleared up once a week or so