[SpiralOcean]

Personally... I use an iPhone app called SplashShopper. You may want to look into it for grocery items.

The main benefit of SplashShopper is the ability to sort by Aisle. This allow you to sort items by aisle and then make one pass through the grocery store.

Other benefits are...
all grocery items are always available, you mark ones you need and then filter to show only needed items.

You can track multiple store locations. This is helpful for items in different stores on different aisles.

You can also track store prices if you want to go to that level.

I'm not sure grocery items fit into the scope of OF.