questionscan you recommend a grocery-shopping list app for…

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Have you checked on any of these? They appear to be what you are asking for but I didn't go in-depth with them.

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You can just use ColorNote. Use the LIST feature. Check off and add as you please.

I use it for all kinds of notes. You can make one for GROCERIES, one for TODO, etc.

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Not exactly what you want, but this is kinda neat since it puts together grocery lists for your the recipes you're interested in: https://play.google.com/store/apps/details?id=com.epicurious&hl=en