PlateMath: Snap Calories

About PlateMath: Snap Calories

PlateMath is a private, on-device meal photo estimator and comparison journal for everyday nutrition awareness.

Photograph a meal and PlateMath produces a readable calorie range, food breakdown, macro estimate, and confidence context without uploading the photo to a developer server. Apple Intelligence is used when available; a deterministic local Vision workflow keeps the core experience useful on supported devices when the model is unavailable.

PHOTO-BASED MEAL ESTIMATES
- Capture a meal with the camera
- Review detected foods, portions, calorie ranges, and macros
- See low-to-high ranges instead of a false exact number
- Check confidence and uncertainty before saving
- Review hidden-calorie prompts and macro cross-checks in Estimate Audit

NEW: CALIBRATION LAB
- Revisit any saved estimate after learning more about the meal
- Record whether the estimate seemed high, low, or close
- Add an optional known calorie total from a label, weighed portion, recipe, or other evidence
- Save confidence and notes in a private comparison journal
- See aggregate evidence count, confidence, and known-value bias over time
- Delete individual reviews or clear them with their linked meal history

HISTORY AND TRENDS
- Save meal notes and estimates locally
- Review daily calorie and macro totals
- Explore seven-day trends and recent meals
- Set a personal daily reference goal
- Schedule optional local meal reminders

TRANSPARENT BY DESIGN
- Public USDA and FDA nutrition references are linked in Settings
- No account, subscription, ads, analytics, or developer-operated server
- Meal photos, estimates, history, and calibration reviews remain on the device
- No automatic model training from your calibration journal

PlateMath provides general nutrition estimates for informational use only. Photo-based estimates can be wrong and are not a substitute for food labels, measured portions, or professional dietary or health guidance.