Grocery List - Tomatoes - This app is a newly-released shopping list app that gets just about everything right, is available for free and runs cross-platform for extra convenience. This free app, with a paid version also available, offers cross-device syncing and loads of item options. s a full fledged mobile shopping list with a load of helpful features. Simply install the app, then register using email, Facebook, or Google account. Click the image for our full review.