Connect your D-Fit account to log meals and water, correct portions, and review daily calories, macros and seven-day summaries. Describe food or attach a photo in ChatGPT, review estimated portions, and save to the same diary you use in D-Fit. Photo nutrition is an estimate; original photos are not copied to D-Fit by this integration. Sign-in and explicit account permission are required. D-Fit provides nutrition tracking, not medical diagnosis or treatment.