EatAlyze is free. Core logging against the built-in food list does not require a key. That is enough for many weekday diaries.
When a dish is not in the list, or you want to snap a plate, or you want advice that uses your restrictions and goals, add your own free Gemini API key. There is no paid key from EatAlyze.
AI answers follow the profile you typed. They are not a diagnosis.
Download EatAlyze from https://eatalyze.australians.com/download