Feeling tired and irritable, anxious and depressed? You may not be sick. You are just thirsty. The human body is about 80% water. The brain contains about 70 - 85% water, muscles - 76%, lungs - 79%. Water is the basis of blood, digestive juices, urine and sweat. Even bones are almost a quarter of water. A person can live without food for several weeks, but without water - only a few days. Water is involved in the regulation of heat exchange, energy synthesis and the removal of waste metabolic products. The human body cannot store water and loses it every day. Up to 200 ml of water leaves the body daily with stools, from 500 to 1500 ml - with urine, up to 400 ml - through breathing, up to 500 ml - through the skin. Water losses and water requirements are influenced by nutrition, respiratory rate, humidity and air temperature, activity level, and metabolic rate. The human body is a symbiosis of water and chemical elements. Therefore, any violation of the water balance can provoke the development of the most serious diseases. Lack of water leads to dehydration, a decrease in blood volume in the body, oxygen starvation, and even shrinking of cells. Having lost only 3% of water, a person can no longer run, the loss of 5% deprives him of the opportunity to train, and the loss of 10% poses a danger to life. That is why for the normal functioning of the body, water reserves must be constantly replenished. How much water do you need to drink during the day? The application will help you know exactly how much water you will need to drink today, taking into account your age, gender, activity, nutrition. Using the application, you will know exactly about the bodys needs for water at any hour of the current day.If you want to be healthy, cheerful and full of energy, then the application is for you!1. Open the app2. Fill out the form2.1. select gender (male or female);2.2. set your weight;2.3. indicate activity in hours per day.After setting your parameters, click "Confirm"3. In the center of the screen (as a percentage), it will be indicated how much water you need to drink for today, or has already been drunk. This value will change throughout the day depending on your actions.4. At the bottom of the screen there are 4 keys:4.1. "Glass of water" - this button must always be pressed as soon as you drank water.4.2. "Drinks" - you always press this button if you drank tea, coffee, alcohol or a variety of sugary drinks.4.3. "Food" - this key must be pressed if you ate flour product, sweets, a portion of protein or a portion of rice.4.4. "Activity" - this key is pressed if you have done a workout, are sick, pregnant or are at an altitude of more than 2500 m.Remember! To find out exactly how much water you have drunk or need to drink, do not forget to go into the application and press the necessary buttons. This is the only way to see the most accurate indicator of the water you drink per day.