Red Box

A tiny game. A little reset.
Remember the red boxes, then enjoy tapping the others.

Red Box website · Play in your browser · Google Play · App Store · Privacy · Support

Flutter · Android · iOS · Web

A moment for you

Red Box is a warm, tactile memory game for a gentle break. A few boxes glow red, then fade. Remember them and tap every other box. Each correct tap turns red too, so the board becomes a small, satisfying puzzle. There is no countdown while tapping and no penalty for trying again.

The little things

• Endless, varied shapes. Seeded silhouettes use 6–16 square boxes; the opening boards have 6, 8, 10, 12, and 9. A gentle curve begins with one red box and gradually mixes one to three.
• Fresh memories. Retries and replays choose new red positions. Pause and resume preserve the round.
• Little steps. Browse unlocked levels, replay a favorite, or jump to a previous level without losing your progress.
• Your own quiet soundtrack. Two original ambient loops, Cloud drift and Warm keys, gentle tap sounds, separate audio switches, and one action to mute everything.
• Comfort controls. Longer previews, reduced motion, optional haptics, and a symbol cue for red boxes.
• A private pocket toy. No accounts, ads, tracking, or in-app purchases. Progress and preferences stay on your device. The native apps work offline; the web game loads its bundled assets over the internet.

Run it locally

Use Flutter 3.47.5 with Dart 3.13.4. Android supports API 24 and newer; iOS supports 15 and newer. The application ID and iOS bundle ID are com.sutechs.redbox.

flutter pub get
flutter run
# Or choose the web target:
flutter run -d chrome

flutter analyze
flutter test
flutter build apk --debug
flutter build ios --simulator --debug
flutter build web --release --no-web-resources-cdn --no-wasm-dry-run

The tests cover reproducible connected shapes, variety, red-position randomness, full rounds, retry, pause/resume, progress, audio, and fully visible square touch targets on small screens.

Patterns and design

final layout = patternForLevel(70, seed: 20261002);
print(layout.mask); // Occupied cells as #, gaps as .

dart run tools/preview_patterns.dart 20261002
# Open design/patterns.html for levels 1–5, 50, 70, 100, and 1000.

The approved Pocket toy guide is saved in design/pocket-toy.html. DESIGN.md documents color, typography, spacing, motion, and board rules; product.md explains gameplay. The pattern sheet shows the function’s exact output.

Releases

Find Red Box on Google Play, App Store, or play online. Visit sutechs.com/redbox for a little look inside.

RELEASING.md covers signing, store assets, GitHub Pages, and remaining account steps. Android release builds require a real upload key and fail clearly when signing configuration is missing. Credentials, keystores, and local release files are ignored by Git.

Every push to main runs format, analysis, and tests, then builds and deploys the game to GitHub Pages. Pull requests run the checks without deploying. The separate Android workflow can build a signed App Bundle when release secrets are configured; it does not automatically submit to Google Play.

Regenerate the marketing screenshots from the real Flutter UI. iPhone and iPad exports are also preserved under store/app-store/screenshots/:

flutter test tools/capture_screenshots_test.dart
python3 -m pip install Pillow
python3 tools/render_store_assets.py
flutter test tools/capture_screenshots_test.dart --dart-define=SCREENSHOT_DEVICE=iphone
python3 tools/render_store_assets.py --device iphone
flutter test tools/capture_screenshots_test.dart --dart-define=SCREENSHOT_DEVICE=ipad
python3 tools/render_store_assets.py --device ipad

Inside the box

Path	What lives there
lib/game/	Seeded patterns, randomized red positions, and round state
lib/ui/	The Pocket toy screens and widgets
lib/core/	Local preferences, music, and sound
assets/	Local fonts, original audio, and brand assets
design/	Approved design guide and pattern sampler
store/	Store listing copy, feature graphic, icon, and marketing screenshots
web/	Web startup, icons, privacy, and support pages

Made by SuTechs. Support: redbox@sutechs.com.

The source is public for inspection; the game code and brand assets remain © 2026 SuTechs, all rights reserved. See LICENSE. Third-party packages and fonts retain their own licenses; THIRD_PARTY_NOTICES.md records the bundled font notices.