Lifesum is a tracking app. If you would like to get an overview of how many calories you are actually eating, you can easily save your meals in the app. The app also calculates how many carbohydrates, proteins and fats you consume. The app also allows you to track your fruit and vegetable consumption, which could make it easier for you to maintain a balanced diet. You can also save how much water you have drunk each day. All these functions are free of charge. However, for additional services, such as recipes, you will need to take out a subscription. As an additional function, it is possible to enter your daily exercise, whereby the calories burned are automatically included in the calorie calculation. The good thing about this app is that calorie tracking gives you an overview of how much you eat per day. The fact that you have a retrospective overview of your current eating habits in your meal diary can also help you to recognize what you might want to change or adjust. A particularly good feature of the app is the ability to track fruit and vegetables, as these are part of a healthy and balanced diet and are often neglected in other apps. The app calculates your turnover from your height and weight. However, this is only a rough value and should always be treated with caution. You should know your body reasonably well and be familiar with the topic in other ways. You should also make sure that you really track your daily exercise - otherwise the calorie value of your app is not adapted to your lifestyle and is not very helpful. And even then, you should always keep this in mind: The app can give you a rough estimate - but it may be that your personal needs are different from what the app tells you, so you should treat the app's information with caution.