Yes the fruit calamansi is categorized and considered to be a simple fruit.
The calamansi fruit is commonly used to flavor other foods and drinks with but you can also eat the calamansi fruit or make calamansi juice.
The calamansi fruit is very healthy for you as well and contains many vitamins, nutrients and antioxidants.
The fruit calamansi also has a sour taste to it so you may not like it at first but it really is a good tasting fruit once you get used to it.
I like to make calamansi juice with them and it gives me a boost in energy and helps boost my immune system as well.