A vegetarian grocery list has one job that a vegan one doesn't: it still needs to make room for eggs and dairy (Greek yoghurt, cottage cheese, a block of feta), because those aren't off the table just because meat is. Treat the two diets as interchangeable and you end up with a shop that's either short on protein or padded out with meat substitutes you didn't actually want.
This builder has a vegetarian diet preset built in, separate from vegan. Set it, dial in your protein and calorie targets, and the free basket gets built around legumes, tofu, eggs and dairy alongside the veg and grains — no meat, no fish, and no need to piece the list together yourself. Prioritise or avoid specific ingredients if you've got preferences, and typical prices are baked in so you can see roughly what the week costs before you're anywhere near the shop. Just try it — set vegetarian, set your targets, and see the basket it builds. The easiest vegetarian week is the one where eggs and dairy are already doing their share.