Digital image analyzing system involving client-server interaction

A method comprising:

• based on a digital image generated by a mobile device, determining a plurality of ingredients in an item;
• for each ingredient of the plurality of ingredients, determining a toxicity metric of said each ingredient;
• generating, based on each toxicity metric of the plurality of ingredients, a safeness rating of the item;
• generating rating data based on the safeness rating;
• causing the rating data to be displayed on a screen of the mobile device;
• wherein the method is performed by one or more computing devices.

A method comprising:

• storing personal data about a user of a mobile device;
• storing a digital image that was generated by the mobile device and that is of a physical item;
• based on the personal data and digital image, identifying notification data that identifies the physical item or an ingredient in the physical item;
• causing the notification data to be displayed on a screen of the mobile device;
• wherein the method is performed by one or more computing devices.