I suggest warning about allergens when ordering food through apps, it's convenient to order food in a few clicks. But a person with a food allergy should first find out if the chosen dish is safe for him. This is especially true for children and teenagers who already use birth themselves, but can not always correctly assess the risks. The information must be directly on the ration card before adding it to the cart. I also suggest providing a filter that will exclude dishes with allergens specified by the user, and a warning when changing the recipe. If a person previously ordered a dish, and now it contains a dangerous ingredient for him, the service must pay attention to this.