Is there an open source food database for nutrition tracking?

Open Food Facts is the largest open-source food database with 3M+ products. OpenNutrition.app built a free database layer on top. USDA FoodData Central is also freely available.

Can AI accurately estimate calories from photos in 2026?

Not reliably. Multiple AI calorie scanner apps exist but accuracy is 15-30% off for homemade meals. Barcode scanning remains the most accurate method. This is a known unsolved problem.

What mobile app replaced MyFitnessPal that is free and privacy-respecting?

OpenNutriTracker (open source, Flutter, no ads). Cronometer (partial free tier). Neither has AI photo scanning. The gap for a polished free privacy-first food logger is still wide open.

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Builders demand an open, accurate, free nutrition database and mobile app after MFP paywalls its data

OpenNutrition's HN launch got 311 points with the top comment 'I wish there was an app to analyse my meals from pictures and estimate the calories/macros.' Multiple builders launched MFP alternatives in 2025-2026. The demand is for an accurate, privacy-respecting, free food logging app with barcode and photo scanning.

Product Idea from this Signal

A mobile app and API that gives developers and consumers verified nutrition data with no paywalled barcode scanning

4001.4k ▲

MyFitnessPal's decision to paywall barcode scanning in 2022 exposed a structural gap: there is no clean, developer-friendly nutrition database that is both accurate and free to query at scale. The USDA FoodData Central API exists but is aging and cumbersome; Open Food Facts is community-maintained with quality inconsistencies. A verified nutrition database exposed as a modern REST API, with a consumer mobile app as proof of capability, gives developers a paid data layer while giving end users a genuinely free calorie tracker.

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