My wife and I use SimpleNote. I know it’s not a proper grocery app but it works really well. One person can create the grocery list initially then share with another. Either of us can then add to the list if we think of things we need or tick the box if we have bought it. Instantly updated on each others tablets, phone, desktop automatically. It’s free too!

I have proton for many years since I started de-googling. Very happy with it.

Windows Vista

I’ve used it for 3 months. Really like it and the options it provides. Very useful resource althougg I’m not self hosting yet. Lack of collaboration an issue but I believed its on the roadmap

Yes MD can be used or just enter text into their pro forma objects

I have been using anytype.io for a few months and love it. Best thing is it’s “local first” so stored on your own devices, just synched online.

Thank you for your comments. Helpful