NourishAI — AI Calorie Counter and Nutrition Tracker (Flutter App)

NourishAI is a polished, production-ready Flutter app for tracking calories and macros — with a functional AI food scanner (not a UI mockup), keyless food data, and monetization built in. One Flutter app + a single Firebase Cloud Function. Single-user, iOS & Android.

Why it’s different

• Real AI, server-side. Snap a photo or describe a meal and get calorie + macro estimates from OpenAI or Gemini (switchable). All AI runs in a Cloud Function — your API keys never ship in the app.
• Keyless food data. Barcode + search via Open Food Facts — no paid food API, plus a bundled seed database (_{125 foods, ~22 recipes).}
• Responsible-use guardrails. Safe calorie floors & weight-pace caps, neutral BMI context, a persistent “estimates only” disclaimer, and an always-available eating-disorder support link — reviewers and stores favor these.
• Offline-first diary. Drift/SQLite on-device; Firestore in the cloud.

Demo

Demo APK: https://drive.google.com/file/d/1jCLXlqmePhpFMZgCPBMG9Lm5za5NW4WT/view?usp=sharing There is no seeded login — the app uses live Firebase sign-up; tap “Continue as guest” to explore, and use Profile → Load demo data to fill ~2 weeks of sample logs.

Features

• Functional AI food scan — photo + describe modes, editable results, 3/day free cap
• Barcode scanner + Open Food Facts search (+ bundled seed DB)
• ️ Offline-first diary — calorie ring, macro bars, meal sections, water, day navigation
• Weight & BMI trend, fasting timer + history, activity logging + step counter
• Diet plans (activate to adjust targets), recipe library, weekly meal planner
• Email, Google, Apple (iOS) & guest sign-in; forgot password; account deletion
• Local reminders — meal / water / fasting / weigh-in
• RevenueCat subscriptions + AdMob (free-tier ads); free/premium gating
• “Ocean & Mint” Material 3 design — light / dark / system
• Responsible-use guardrails baked in

Tech stack

• Flutter 3.x, Dart 3.11
• Riverpod 3, GoRouter, Drift (SQLite), freezed/json_serializable, fl_chart, google_fonts (Plus Jakarta Sans)
• Firebase Auth, Firestore, Functions, Remote Config
• One Cloud Function (Node 20 + TypeScript) — OpenAI + Gemini
• Open Food Facts (keyless), RevenueCat, Google Mobile Ads

What’s included

• Full Flutter source + the Cloud Function source
• Drift offline cache + Firestore data model + strict per-uid security rules
• Ocean & Mint design system (light/dark/system)
• RevenueCat + AdMob integration; local-notification reminders
• Seed data (125 foods, ~22 recipes, 5 diet plans) + one-tap demo seeder