Our team developed a plugin for WordPress where you can give your visitors the ability to find out how many calories they should eat a day based on weight and age.
WordPress is a very popular blogging platform that is used a lot lately for building more complex websites.
You have to go to wordpress plugin directory and download the plugin. Then you can add it into your template or to drag it as a widget to one of your theme sidebars. You can also install Calotor Calorie plugin directly from your administration panel.
If you have any issues, questions or concerns don't hesitate to ask.