MillionFriends is a lifestyle app developed by Perfood GmbH, available on Android for free. The app serves as a personal nutrition diary where you can record your meals, activities, medications, mood, and sleep. It provides insights into how your body reacts to different foods and gives you an individual evaluation of your blood sugar levels, calorie intake, and more.

The app's features include a nutrition diary where you can track your meals and count calories using the extensive food database. The app also shows you which macronutrients you are consuming and how your blood sugar reacts. Additionally, you can keep track of your meals, sports, mood, medications, and sleep in the daily overview. You can monitor your calorie intake and the nutritional values of your meals.