Sometimes, you just do not know how many nutrients that your body acquired in a day. While some people consider that as unnecessary, it is actually important. The reason is that tracking nutrient will give you information about how much good or bad thing that you consume in a day. Therefore, it is basically also a measurement that can determine your health. Take one example if you actually eat too much salt in a day. You should know that your life can be screwed because of hypertension. This one example is definitely oversimplified, and there are some other situations where you absolutely need to track nutrient.
If you have a smartphone, it is practically possible to track nutrient intake without difficulties. The reason is that there are so many applications that can help you to achieve such purpose. If you are using Android device, you can go to the store and just choose the application from fitness category. You obviously also can find similar iPhone app but the applications may come in different names. After all, you are looking for an application that can keep track on your nutrient intake. Even though you are using application, it does not mean you can just let it installed on your smartphone.
Instead, you need to fill the data so that the application can calculate the total nutrient that you consume in a day. You need, to be honest in inputting the data. Therefore, the most recommended action that you should do is inputting the data right after you consume something. That includes plain water and any foods that you think subtle enough to have the slightest amount of nutrient. That way, you will get an accurate measurement on how many nutrients you get per day. This also allows you react on something that may happen in the future.