AI Health App Bundle — Three Complete Flutter Apps

Three production-ready Flutter source-code apps in one purchase: CalmAI (mental health companion), NourishAI (AI calorie & nutrition tracker) and ChefAI (AI recipe generator & meal planner). Each is a standalone product with its own Firebase project, its own design system and its own store listing — reskin one, or ship all three.

Bought separately these are $19 each — $57 for all three. This bundle is $39.

Prefer to buy just one? Each app has its own listing:

CalmAI — AI Mental Health & Wellness Companion App (Flutter)
NourishAI — AI Calorie Counter & Nutrition Tracker (Flutter App)
ChefAI — AI Recipe Generator, Meal Planner & Calorie Tracker (Flutter Full App)

Every app shares the same architecture — Flutter, Riverpod, GoRouter, Firebase Auth and Firestore, a Cloud Functions AI backend, dual AI providers (OpenAI or Gemini, switchable without an app update), RevenueCat subscriptions and AdMob — so learning one means you already know the other two. The bundle ships with a single unified documentation site that sets up the shared parts once, then covers what differs per app.

Your AI key never ships in the app

All three apps call OpenAI or Gemini through their own authenticated Firebase Cloud Function. Your provider key lives in Cloud Functions secrets — never in the source, never in Remote Config, never in an APK or IPA. Decompiling a release build yields nothing worth having.

✅ Key stays server-side — Google Secret Manager, injected into the function at runtime
✅ Authenticated calls only — an unauthenticated request is rejected before a single token is spent, so the endpoint is not an open proxy to your paid account
✅ Server-enforced daily caps — the counter lives in Firestore and the shipped security rules make it read-only to clients, so a modified app cannot reset it
✅ Prompts live on the server — the client sends structured parameters, never a prompt string, and every value is bounded before it reaches the model
✅ Firestore rules and indexes included for all three apps, written against their real collection layouts

This needs the Firebase Blaze (pay-as-you-go) plan, which is what Cloud Functions require. Blaze still includes the free tier.

Third-party services — you pay for these, not us

You are buying source code. You are not buying the services it runs on. Every external account these apps connect to is opened in your name, billed to your payment method and governed by that provider’s terms. Item support covers the code; it does not cover, subsidise or refund third-party charges.

OpenAI or Google Gemini — billed per token on every request your users make. This is the cost that grows with your user base. Set a hard spending cap in your provider dashboard before launch.
Firebase (Auth, Firestore, Remote Config, Hosting) — free within the Spark quota, then pay-as-you-go on Blaze.
Firebase Cloud Functions — the Blaze plan is required; Functions cannot be deployed on the free Spark plan. There is a large free invocation tier above that.
RevenueCat — free below their monthly tracked-revenue threshold, then a percentage of tracked revenue. Optional.
Google AdMob — free; AdMob pays you. Optional.
Apple Developer Program ($99/year) and Google Play Console ($25 one-off) for store distribution.

Nothing bills you until you connect your own accounts. Prices and free tiers are set by each provider and can change — check their pricing pages before you commit. The included documentation has a full breakdown with the numbers.

CalmAI — AI Mental Health & Wellness Companion

A complete wellness app plus a web admin panel built from the same codebase. 42 screens.

AI therapy chat — CBT-oriented, with conversation history and starters
Mood logging — 8 mood types, intensity slider, trigger tags, AI acknowledgment
Guided journal — free write, AI-prompted, and a 6-step CBT thought record
️ 5 breathing exercises — fully animated, 100% offline
Sleep tracker — duration ring, weekly chart, 30-night history, streak chip
✅ Habit tracker — custom habits, tap-to-complete, 30-day heatmap
Guided meditations — 8 bundled scripts narrated by on-device TTS, no API call to play
Worry Box — CBT worry postponement with a daily review flow
SOS coping cards — persistent button on every screen, 10 grounding techniques and tap-to-dial crisis lines, all offline
19 milestone badges and day streaks
️ Web admin panel — dashboard, user management, crisis moderation, analytics, config editor, CSV reports, immutable audit log
Safety system — client-side crisis detection before every API call, offline crisis resources for 5 regions, mandatory disclaimer gate, and safety rules baked into the server-side system prompt so a repackaged build cannot strip them

→ View CalmAI as a standalone item ($19)

NourishAI — AI Calorie & Nutrition Tracker

Offline-first calorie tracking with a keyless food database behind it. 21 screens.

AI food scan — photo or free-text description, editable results, 3/day free cap enforced server-side
Barcode + food search via Open Food Facts — keyless, no paid food API, plus 370+ bundled seed foods and 35+ recipes
️ Offline-first diary — Drift/SQLite on device, Firestore in the cloud; edits made offline retry automatically
Insights — 7/30/90-day averages, calorie chart, macro split, logging consistency and streaks
⚖️ Weight & BMI trend, fasting timer with history, activity logging with a step counter
Diet plans, recipe library, weekly meal planner
Local reminders — meal, water, fasting, weigh-in. No push backend to run.
Responsible-use guardrails — safe calorie floors, weight-pace caps, neutral BMI context, persistent “estimates only” disclaimer, and an always-available eating-disorder support link that is never premium-gated

→ View NourishAI as a standalone item ($19)

ChefAI — AI Recipe Generator & Meal Planner

Pantry to plated, with a planner and shopping list behind it. 25 screens.

AI recipe generation — enter what you have, get complete recipes with nutrition, chef tips and substitutions
7-day meal planner — auto-generated against a calorie goal, diet preference and cuisine variety rules
Smart shopping list — built from the weekly plan, duplicates merged with quantities summed, grouped by supermarket aisle, tick-off state survives plan changes
Nutrition tracker — calorie ring, macro bars, one-tap logging, water tracker, weekly history
AI nutrition lookup — type any food, preview calories and macros, add it. No barcode needed.
‍ Cooking mode — full-screen steps, screen stays awake, auto countdown timers, voice navigation, ingredients panel
Serving adjuster — scale 1 to 12+ servings with fraction formatting
️ Voice input, recipe library, explore screen, full dark mode
⚙️ Model ids in Remote Config — when a provider retires a model it is a console change, not an app store release

→ View ChefAI as a standalone item ($19)

Tech stack

Flutter 3.x / Dart 3.x — Android and iOS, plus web for the CalmAI admin panel
State: Riverpod (2.x in CalmAI, 3.x in NourishAI and ChefAI)
Routing: GoRouter
Models: freezed + json_serializable
Backend: Firebase Auth, Cloud Firestore, Remote Config, and Cloud Functions (Node 20 + TypeScript) in all three apps
Local storage: Drift/SQLite in NourishAI; Hive + SharedPreferences in CalmAI and ChefAI
AI: OpenAI and Google Gemini, switchable per app
Food data: Open Food Facts (keyless) in NourishAI
Monetization: RevenueCat subscriptions + Google AdMob
Charts: fl_chart · Voice: speech_to_text, flutter_tts
Android: compileSdk and targetSdk 36 in all three apps

What’s included

Full Flutter source for all three apps — no obfuscation, no compiled-only modules
CalmAI’s web admin panel source (11 admin screens) and Firebase Hosting config
Three Cloud Functions backends — one per app, TypeScript, including the server-side rate limiters
Firestore security rules and indexes for all three apps
Placeholder Firebase config templates (firebase_options.dart.example and friends) so you connect your own project in one command
Three complete design systems, each with light and dark themes driven by one constants file
Bundled offline content — 370+ foods, 35+ recipes and 5 diet plans in NourishAI; breathing exercises, meditation scripts, coping cards and crisis resources in CalmAI
Unit tests — 20 test files in CalmAI (including the safety-critical crisis detector), 13 in ChefAI, 6 in NourishAI
One unified documentation site — shared setup written once, then a section per app, with in-document screenshots, a third-party cost breakdown, a quick-start guide and a production checklist
The full screenshot set for all three apps
6 months item support and lifetime updates

⚡ Quick setup

flutter pub get
dart run build_runner build --delete-conflicting-outputs
Change the bundle identifier off the com.devsnack.* namespace — the same value on both platforms
flutterfire configure against your own Firebase project on the Blaze plan. This generates the config files, which are not in the archive — only .example templates are.
Enable Auth, Firestore and Remote Config in the console
cd functions && npm install, then firebase functions:secrets:set OPENAI_API_KEY (or GEMINI_API_KEY)
firebase deploy --only functions,firestore:rules,firestore:indexes
Add RevenueCat and AdMob keys (both optional)
flutter run

Steps 6 and 7 are the same in all three apps. There is no API key field anywhere in the Flutter source — that is the point.

⚙️ Requirements

Flutter 3.x on the stable channel
Node 20 — each app builds and deploys its own Cloud Functions backend
A Firebase project per app, on the Blaze plan (Cloud Functions are not available on Spark)
An OpenAI or Gemini API key — your account, your spend
Optional: RevenueCat and AdMob accounts (free tiers)
Apple Developer and Google Play Console accounts for store distribution

Honest notes

Stated up front so nothing surprises you after purchase — all of this is documented in detail in the included docs.

Every app needs Blaze and a Functions deploy before its AI works. That is the cost of keeping your provider key off the device. Everything else — breathing exercises, the diary, barcode search, the shopping list, the whole UI — runs before you deploy anything.
No Firebase config ships in the archive, so nothing compiles until you run flutterfire configure. Deliberate: it makes it impossible to accidentally ship a build pointed at someone else’s project.
The AI rate limit is per user, per day. It is enforced server-side and cannot be bypassed from a modified client, but only a cap in your provider dashboard bounds your total spend across all users. Set one.
Premium status is client-writable by default. The apps set a Firestore flag after a RevenueCat purchase; the functions prefer a premium custom auth claim. Wiring a RevenueCat webhook to mint that claim is left to you, and the rules file shows the one line to add.
English only. No l10n scaffold in any of the three; strings are inline.
No wearable sync. NourishAI reads the device step sensor; there is no Apple Health or Google Fit integration.
No web or desktop targets beyond CalmAI’s admin panel.
Single-user apps. No social, community or multi-user features.
CalmAI is not a medical device and must not be presented as one. Its disclaimers, age gate and crisis-detection layer are deliberate — keep them.

Support

Email devsnack26@gmail.com · WhatsApp +855 96 741 3911

Typical response within 24 hours on business days. Please include your CodeCanyon purchase code, which app you are working on, your flutter --version output, and the full error text.

Six months of item support is included. You bring your own Firebase projects, AI keys, store accounts and hosting — support covers the code, not the accounts, and not the third-party bills.

Changelog

Bundle 1.1.0 — CalmAI and ChefAI moved their AI calls to their own Cloud Functions backends, so no app in the bundle ships a provider key. Server-enforced AI quotas and Firestore security rules in all three. Firebase config replaced with placeholder templates. CalmAI’s application identifier unified across platforms. compileSdk/targetSdk pinned to 36 everywhere. Documentation rewritten with a third-party cost breakdown and in-document screenshots.

Bundle 1.0.0 — First release of the three-app bundle with unified documentation covering shared setup once and each app in its own section. Component versions at publication: CalmAI 1.1.0, NourishAI 1.1.0, ChefAI 1.1.0. Per-app feature history is on each app’s individual item page.

AI Health App Bundle — CalmAI + NourishAI + ChefAI | 3 Flutter Full Apps