Description
Recall AI — AI-Powered Flashcard & Spaced Repetition App
Recall AI is a complete, production-ready Flutter application
that helps users learn anything faster using AI-generated flashcards and the
proven SM-2 spaced repetition algorithm. Built with clean architecture,
Riverpod state management, Firebase backend, OpenAI card generation, and
RevenueCat subscriptions — everything you need to launch your own study app on
Android and iOS.
✨ Key Features
-
AI Flashcard Generation — Paste notes, type a topic, or
upload an image of your notes. OpenAI (GPT-4o-mini) generates a full deck of
flashcards in seconds. -
SM-2 Spaced Repetition — The same algorithm used by Anki.
Cards are scheduled at the optimal interval for long-term retention (New →
Learning → Review → Mastered). -
4 Study Modes — Flashcard flip, Multiple Choice (MCQ) with
explanations, True/False, and Typing mode (Pro). -
OCR Input (Pro) — Upload a photo or image of your notes.
Google ML Kit extracts the text, then AI turns it into a study deck. -
AI Study Guide — Per-deck AI-generated overview with key
concepts, common mistakes, and memory tips. -
Gamification — XP, levels, daily streak tracking with 2× XP
multiplier, badges, and mastery percentage per deck. -
Analytics Dashboard — Weekly study chart, subject mastery
breakdown, level progress bar, and badge showcase. -
Deck Sharing & Explore — Share decks with a 6-character
code. Browse and import from a public community feed. -
Study Reminders — scheduled local notifications tell users
how many cards are due, with optional streak-protection alerts. No backend
required; works offline. -
In-App Subscriptions — Free, Monthly, Yearly, and Lifetime
tiers managed via RevenueCat with a built-in paywall screen. -
Dark & Light Theme — Material 3 design with dynamic
color scheme. Fully customizable brand color. -
4 Auth Providers — Email/password, Google Sign-In, Sign in
with Apple, and anonymous guest mode. -
Offline / Guest Mode — Guests study locally via
SharedPreferences. Authenticated users sync via Firestore. -
Portrait-only, phone-first UI — Pixel-perfect Material 3
design with Figtree font.
Screens Included
- Splash Screen with brand animation
- Onboarding carousel (3 slides)
- Sign In / Sign Up (Email, Google, Apple, Guest)
- Home Overview — stats card, recent decks, quick start
- Deck List — search, sort, filter by subject & mastery
- Deck Method Selection — 4 creation modes
- Deck Creation — AI generation form with subject, difficulty, card count
- Deck Detail — 3 tabs: Flashcards, Stats, AI Study Guide
- Deck Edit — add, edit, reorder, delete cards
- Study Session — 4 modes with progress header
- Study Summary — results, XP earned, mastered cards
- Progress / Analytics — level, streak, weekly chart, badges
- Profile — account info, subscription status, quick stats
-
Settings — theme toggle, study goals, reminder time and streak alerts, sign
out - Explore — browse community-shared decks
- Import Deck — 6-character share code lookup
- Paywall — subscription plans with feature comparison
Tech Stack
- Framework: Flutter 3 / Dart 3
- State Management: flutter_riverpod
- Routing: go_router with route guards
-
Backend: Firebase Auth, Cloud Firestore, Firebase Remote
Config -
AI: OpenAI GPT-4o-mini (key stored in Remote Config — no
hardcoding) - Monetization: RevenueCat (purchases_flutter)
- OCR: Google ML Kit Text Recognition
-
Design: Material 3 · Figtree font · Teal seed color
(#0D9488) -
Architecture: Clean architecture per feature (presentation
/ application / domain / data) - Testing: Unit tests + policy tests included
Subscription Tiers
Plans: Free · Monthly ($4.99) · Yearly ($29.99) · Lifetime
($49.99). Every paid plan unlocks the same Pro feature set — only the billing
period differs.
- Max decks — Free: 5 · Pro: unlimited
-
AI generations per day — Free: 3, plus one more for each
optional rewarded video · Pro: unlimited - Cards per generation — Free: 15 · Pro: 50
- Character input limit — Free: 2,000 · Pro: 20,000
- Image upload (OCR) — Free: ✗ · Pro: ✓
- Deck sharing — Free: 1 deck · Pro: unlimited
- Analytics history — Free: 7 days · Pro: all time
- Ads — Free: optional rewarded videos · Pro: none
⚙️ Requirements to Launch
- Flutter SDK 3.x
- Firebase project (free tier works fine)
- OpenAI API key (added to Firebase Remote Config — no code change needed)
- RevenueCat account (free up to $2,500 MRR)
- Google Play Console ($25 one-time) for Android
- Apple Developer account ($99/year) for iOS + Sign in with Apple
What’s Included
- Complete Flutter source code (Android + iOS)
-
Full offline HTML documentation (
docs/documentation.html) - Quick Start Guide (
docs/quick-start.html) - Unit tests + policy tests
- Clean architecture, well-commented and ready to customise
Changelog
Version 1.1.0 — Reminders, Rewarded Ads & Toolchain Upgrade
Upgrade note: this release raises the minimum toolchain to Flutter 3.44 /
Dart 3.12, JDK 17 and Android Gradle Plugin 9.
-
New — Study Reminders. Opt-in daily notification at a time
the user picks, showing how many cards are due, plus an optional alert when
a streak is about to break. Local notifications, so no backend is required
and they work offline and in guest mode. -
New — Rewarded video ads. Free users get 3 AI generations
per day, then can watch an optional rewarded ad to earn one more. Pro
subscribers are never gated and see no ads. -
New — Release signing via
android/key.properties, with an example file included. Release
builds were previously debug-signed, which Google Play rejects. -
New — Privacy policy draft
(docs/privacy-policy.md) plus tappable Terms / Privacy links on
the sign-up screen and in Settings. -
New — Play Store release guide
(docs/play-store-release.md) with Data Safety form answers and
a submission checklist. -
Upgraded Riverpod to 3.4.2, go_router to 17.5.0, RevenueCat
to 10.8, Google Sign-In to 7.2, Sign in with Apple to 8.1, fl_chart to 1.2,
google_fonts to 8.2, ML Kit to 0.16, and the Firebase suite to current. -
Upgraded the Android toolchain to Gradle 9.1.0, AGP 9.0.1,
Kotlin 2.3.20 and google-services 4.4.4. -
Fixed a silent failure where a release build without a
RevenueCat key shipped with an empty key and failed every purchase with no
error shown. -
Fixed the iOS Google Sign-In URL scheme, which was missing
and prevented the sign-in callback from returning. -
Documentation corrected — previous versions described
banner ads and push reminders that were not present in the code. Those
features now exist, and the docs describe what actually ships.
Version 1.0.1 — Bug Fixes
-
Fixed the flashcard answer side sometimes being unreadable — the answer now
uses guaranteed-contrast Material 3 colors in both light and dark themes,
with a clear placeholder when a card has no answer. -
Fixed newly imported or created decks occasionally showing no flashcards —
the deck’s cards now appear immediately (stale cached card list is refreshed
after save/import). -
Renamed the “Upload PDF / Image” creation option to “Upload Image” to
accurately reflect image-based OCR input. -
Added the iOS photo library usage description
(NSPhotoLibraryUsageDescription) for App Store compliance when
importing images for OCR.
Version 1.0.0 — Initial Release
- AI flashcard generation via OpenAI GPT-4o-mini (paste notes, topic, OCR)
- SM-2 spaced repetition engine with 4 card states
- 3 study modes: Flashcard, MCQ, True/False
- AI-generated per-deck Study Guide
- Gamification: XP, levels, streaks, badges
- Analytics dashboard with weekly chart and subject breakdown
- Deck sharing with 6-character codes and public Explore feed
- RevenueCat subscriptions: Monthly, Yearly, Lifetime
- 4 auth providers: Email, Google, Apple, Anonymous
- Dark / Light theme toggle
- Full offline guest mode
- iOS arm64 simulator support (MLKit 0.15.1 + platform 15.6)
Support
We provide dedicated support for all CodeCanyon buyers. Please include your
purchase code when reaching out.
-
Email:
devsnack26@gmail.com -
WhatsApp:
+855 967 413 911
Response time: within 24–48 hours on business days.
