No. Personal trainers can offer meal plans, macro targets, and education for the general population. The Smart Meal Planner uses proven nutrition science to guide clients safely. However, always refer medical cases to a dietitian.
It is always a good idea to check your local laws and legislations from the local regulating body in your state, province, city, or country to get clarity on whether or not nutrition advice/services are a regulated practice. That way, you can make an informed decision on what nutrition services you're able to deliver.