Nice work, I definitely appreciate the focus on simplicity/speed. I just signed up to check it out.

I noticed on the invoice page, on mobile, the number inputs (qty, price, etc) showed the full alpha keyboard on input. I think you can add a few attributes to optimize, without using JS also.

Great work, thanks for sharing.

This link has been helpful for me:

https://developers.google.com/web/fundamentals/design-and-ux...