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Quit‑smoking companion app (Flutter)

Nonic is a cross‑platform Flutter app that helps users quit smoking and stay smoke‑free. It combines daily check‑ins, craving logging, smart risk insights, milestone tracking, savings goals, and gentle notifications to support behavior change.

Free to use: Nonic is free for anyone. No account required; all data stays on your device.

• APK (Android):Download latest release
  • Install by sideloading: transfer the APK to your device, then open it and allow installation from this source when prompted.

• Personal profile: capture quit date, typical cigarettes/day, pack price, demographics
• Daily check‑ins: log mood and urge; one-per-day upserted storage
• Cravings log: record intensity, triggers, and strategies; view history
• Slip logging: track any cigarettes smoked after quitting for honest trends
• Smart risk score: 0–100 insight from last 7 days of urges/moods/cravings
• Actionable tips: context‑sized advice based on current risk
• Health timeline: motivational milestones from minutes → months after quit
• Savings tracker: money saved and cigarettes avoided since quit date
• Notifications: daily check‑in reminder and scheduled health milestone nudges
• Beautiful UI: custom glassmorphism theme with concise cards and metrics

• lib/models.dart: data models (UserProfile,CravingEntry,SlipEntry,SavingsGoal,DailyCheckIn)
• lib/storage.dart: persistence viashared_preferences (stringified JSON)
• lib/utils.dart: calculations (risk score, BMI, pack‑years), tips, notifications
• lib/theme.dart: dark theme +Glass UI helper
• lib/pages/*: screens (onboarding, dashboard, check‑in, cravings, goals, support, SOS breathing, etc.)
• lib/main.dart: app bootstrap, profile load, notification scheduling

• Flutter SDK (Dart ^3.9, seepubspec.yaml)
• Platform toolchains as needed (Android Studio/Xcode, etc.)

flutter pub get

# choose a device (emulator or real)flutter devicesflutter run

# Android (debug/release)flutter build apk# iOS (requires macOS/Xcode)flutter build ios# Webflutter build web

• No Nic stores data locally on your device. No accounts, no cloud.
• Notification permission is requested to deliver gentle reminders and milestones.

• Local notifications: usesflutter_local_notifications andtimezone.
  • App schedules a daily check‑in at 20:00 and future health‑timeline milestones based onquitDate.
  • Timezone is initialized with a conservative fallback to UTC when native info is unavailable.
• Data storage: persisted locally viashared_preferences using JSON strings; no backend required.
• One check‑in per day:StorageService.upsertCheckIn replaces the same‑day entry.

• Onboarding (OnboardingScreen): enter name, quit/start dates, consumption, pack price, age, gender, weight/height. SavesUserProfile and schedules notifications.
• Dashboard (DashboardScreen): shows days smoke‑free, avoided cigarettes, savings, next milestone countdown, today’s risk and tip, and quick actions (log craving, list cravings, daily check‑in, log slip).
• SOS: quick access to guided 4‑7‑8 breathing.

• Flutter + Material 3 (custom theme)
• Packages:shared_preferences,intl,flutter_local_notifications,timezone,cupertino_icons

This is an early functional prototype suitable for local use and further iteration.

• Optional secure cloud sync
• Streak achievements and share cards
• More adaptive tips via analytics
• Widgets/Live Activities/Complications per platform

MIT — free for personal and commercial use. SeeLICENSE (add one if missing).