ShadeWin

Live number-prediction game with clear color and size results.

ShadeWin is a real-time color and number results platform for users who want a simple, fast game experience built around live rounds, color outcomes, and big/small style predictions. It is designed for casual players who want an easy-to-understand interface, instant result updates, and a clean mobile-first experience that keeps pace with timed rounds.

Business Goals

  • Reach 10,000 monthly active users within 90 days of launch.
  • Achieve a 25% registration-to-first-play conversion rate within 60 days.
  • Maintain 35%+ 30-day retention among registered users by the end of month 4.
  • Keep round-result delivery latency under 1 second for 99% of sessions.
  • Drive 15% of active users to return daily through notifications and live round reminders.

User Goals

  • See the next round countdown and current status clearly at a glance.
  • Make a prediction in under 10 seconds on mobile.
  • Receive round outcomes instantly when the timer ends.
  • Understand results using simple labels like color, number range, and big/small.
  • Review recent history to spot patterns without confusion.

Non-Goals

  • Not a betting, gambling, or money-cashout platform in the MVP.
  • Not a prediction engine that guarantees wins or provides illegal hacks.
  • Not a social network with chat rooms, leaderboards, or influencer feeds in the first release.
  • Not a multi-game casino product; only the live round format is in scope.

Casual Player Aman, 27 - Aman checks live number-result games on his phone during breaks and wants a fast, clean interface. He needs the next round timing and result display to be easy to understand immediately.

Casual Player Aman, 27

  • As a casual player, I want to see the current countdown and next result window, so that I know when to place my prediction.
  • As a casual player, I want a simple choice between color and number options, so that I can play quickly without confusion.
  • As a casual player, I want to view recent round history, so that I can follow the pattern of outcomes.

Returning User Priya, 34 - Priya comes back daily and values speed, reliability, and a smooth mobile experience. She wants the app to remember her preferences and keep her informed of round starts.

Returning User Priya, 34

  • As a returning user, I want my last-selected prediction mode to be remembered, so that I can act faster each session.
  • As a returning user, I want push reminders before live rounds, so that I do not miss outcomes.
  • As a returning user, I want the app to recover gracefully if a round is delayed, so that I trust the timing display.

Admin Operator Rohan, 39 - Rohan manages the live round schedule, publishes results, and monitors system health. He needs controls for content updates, auditability, and error handling.

Admin Operator Rohan, 39

  • As an admin, I want to publish scheduled round results, so that live timing stays accurate.
  • As an admin, I want to see failed result deliveries and sync issues, so that I can correct them quickly.
  • As an admin, I want audit logs for all result changes, so that I can track accountability.

Live Round Engine · High priority

  • The system must run timed rounds with a visible countdown, accepted prediction window, and result publication at the end of each round.
  • Display round start, active, closing, and resolved states with clear timestamps.
  • Lock predictions when the round closes and reject late submissions with a visible message.
  • Support configurable round durations such as 30 seconds, 1 minute, and 3 minutes.
  • Persist each round result with a unique round ID and server-generated timestamp.
  • Handle delayed updates by showing a sync banner instead of stale data.

Prediction Interface · High priority

  • Users need a very fast, mobile-first way to choose number range, color, and big/small style options.
  • Allow one-tap selection for number buckets 0–4 and 5–9, plus color mapping.
  • Show the currently selected prediction before submission.
  • Validate inputs client-side and server-side to prevent duplicate or malformed predictions.
  • Support a submission confirmation state with haptic or visual feedback on supported devices.
  • Disable submission while offline and queue only if the round is still open when reconnected.

Results and History · High priority

  • Users must be able to see live results, recent history, and outcome details in a simple format that matches the round timer.
  • Show the last 20 results in reverse chronological order.
  • Mark winning result attributes including number, color, and big/small.
  • Support filtering by today, last 7 days, and custom time window.
  • Refresh results automatically without full page reloads.
  • Show no-result or pending states clearly when the next round has not closed.

User Accounts and Preferences · Medium priority

  • The app should support login, remembered preferences, and notification settings to improve retention and re-entry speed.
  • Support phone OTP or email login for lightweight onboarding.
  • Save default prediction mode and preferred round duration per user.
  • Allow notification opt-in for round reminders and result updates.
  • Provide account deletion and export requests from settings.
  • Keep guest mode limited to viewing only, if enabled.

Admin and Moderation Controls · Medium priority

  • Admins need tools to manage live rounds, update results, and monitor operational issues.
  • Create an admin dashboard for round scheduling and manual overrides.
  • Add role-based access control for admin and super-admin roles.
  • Record audit logs for every result edit, publish, and rollback.
  • Expose health indicators for API latency, sync failures, and notification delivery.
  • Allow emergency pause of rounds if data integrity issues are detected.

Fast Onboarding to First Round

  • Open the app and land on the live round screen immediately.
  • See the countdown, current round ID, and prediction options above the fold.
  • Choose a prediction mode such as color, number bucket, or big/small.
  • Sign in only when saving history or notifications is needed.
  • Place the first prediction in under 30 seconds from app open.
  • View the result when the round closes, with an instant highlight of the outcome.

1. Live Round View

  • The home screen shows the current round, countdown timer, and available prediction choices in a single clean layout.
  • Use a server-synced timer to avoid drift.
  • Show a clear state if the round is open, closing soon, or resolved.

2. Make Prediction

  • Users tap a number range, color, or big/small choice and confirm their selection.
  • Prevent multiple active submissions for the same user and round.
  • Show a validation message if the round has already closed.

3. Submit and Confirm

  • The app sends the prediction to the backend and returns an immediate confirmation state.
  • Display loading and success states without blocking navigation.
  • If the network fails, show retry guidance and preserve the selected choice locally.

4. Result Reveal

  • When the timer ends, the result is revealed automatically and the winning attributes are highlighted.
  • Animate the result transition for clarity without delaying data display.
  • If the result is delayed, show a neutral pending state and estimated refresh time.

5. History and Review

  • Users can browse recent rounds to review outcomes and compare them with their past selections.
  • Support date filters and round-by-round detail view.
  • Show empty states when there is no history for a selected range.

Power Features and Edge Cases

  • Custom notification rules for favorite round durations and reminder timing.
  • Multi-device session sync so a user can start on mobile and review history on desktop.
  • Admin rollback for incorrect result publications with audit trace.
  • Offline-safe viewing of cached history with a clear stale-data indicator.
  • Abuse prevention for repeated submission attempts and bot-like activity.

Visual Clarity and Speed

  • Large countdown timer with color-coded urgency states.
  • High-contrast color palette that supports accessibility and color-blind-safe labels.
  • One-handed mobile layout with primary actions anchored in the thumb zone.
  • Sub-500 ms interaction feedback for button taps and state changes.
  • Readable typography, minimal clutter, and low-animation mode for sensitive users.

Aman opens the app during a short break and immediately sees the live countdown, round ID, and prediction options. He taps a choice, submits it in seconds, and knows the app accepted it before the round closes.

When the timer ends, the result appears instantly with the winning number, color, and big/small label highlighted. Aman checks the last few rounds, feels confident the timing is accurate, and returns later because the interface makes each session fast and understandable.

For the business, that smooth loop turns casual visitors into repeat users. Clear live timing, reliable updates, and simple navigation create trust, which increases retention and daily engagement without requiring a complex feature set.

User-Centric Metrics

  • Time to first prediction under 30 seconds for 80% of new users.
  • Prediction submission success rate above 98%.
  • Result reveal seen within 1 second of round close for 99% of sessions.
  • 30-day returning user rate above 35%.
  • Notification opt-in rate above 25% among registered users.
  • Support tickets related to timing or stale results below 2% of total sessions.

Business Metrics

  • 15% month-over-month growth in active users for the first 3 months.
  • 25% registration conversion from landing to signup.
  • 20% of users active on at least 5 days per month by month 4.
  • 40% of new users returning within 7 days.
  • Reduce churn after first session by 20% compared with baseline.

Technical Metrics

  • 99.9% uptime for live result services.
  • P95 API latency under 300 ms for prediction submission.
  • P95 round-state sync under 1 second from server to client.
  • Zero critical security incidents and no unauthorized admin access.

Tracking Plan

  • Track app_open to measure entry volume and device mix.
  • Track round_viewed when the live round screen loads.
  • Track prediction_selected when a user chooses a number, color, or big/small option.
  • Track prediction_submitted with round ID, choice type, and latency.
  • Track result_revealed with round ID and time-from-close.
  • Track notification_opt_in and notification_clicked to measure retention channels.
  • Track admin_result_published and admin_result_edited for audit and operations.

Technical Needs

  • Frontend built with Next.js and TypeScript for fast web delivery.
  • Backend API using Node.js with NestJS or Express for round and prediction logic.
  • Real-time updates through WebSockets or Server-Sent Events.
  • PostgreSQL for transactional storage of users, rounds, predictions, and audit logs.
  • Redis for countdown sync, caching current round state, and rate limiting.
  • Background jobs using BullMQ or a managed queue for notifications and scheduled round transitions.
  • Observability using OpenTelemetry, Sentry, and structured logging.

Integration Points

  • Firebase Cloud Messaging or OneSignal for push notifications.
  • Twilio or a similar OTP provider for phone verification.
  • Auth provider such as Clerk, Auth0, or Supabase Auth.
  • Stripe only if future paid features are introduced, not for MVP core play.
  • Google Analytics 4 or PostHog for product analytics.

Data Storage & Privacy

  • Store only necessary user profile fields and prediction history.
  • Encrypt sensitive data in transit with TLS and at rest in the database.
  • Support account deletion and data export requests for GDPR and CCPA readiness.
  • Maintain role-based access control for admin actions and audit logs.
  • Set retention rules for logs and analytics events to minimize exposure.

Scalability & Performance

  • Use server-sent events or WebSockets to push state changes instead of constant polling.
  • Cache current round state in Redis to reduce database load during peak activity.
  • Paginate history views to keep initial render fast on low-end devices.
  • Design for burst traffic at round boundaries when many users refresh simultaneously.

Potential Challenges

  • Round timing drift could confuse users; mitigate with server-authoritative timers and client sync checks.
  • Users may attempt duplicate submissions; mitigate with idempotency keys and round locks.
  • Color-only UI can be inaccessible; mitigate with text labels, icons, and high-contrast modes.
  • Admin mistakes could publish wrong results; mitigate with approval logs, rollback, and restricted permissions.
  • Notification fatigue could reduce retention; mitigate with user-configurable quiet hours and reminder frequency limits.

Team & resourcing - Small team - 2 engineers, 1 designer, part-time PM, and shared QA support.

Phase 1: MVP Live Rounds · Weeks 1–4

  • Live round page with countdown and prediction options.
  • Backend round scheduler and result publisher.
  • Prediction submission flow with validation and audit logs.
  • Basic responsive UI for mobile and desktop.

Phase 2: History and Accounts · Weeks 5–7

  • OTP or email login.
  • User preferences and saved prediction mode.
  • Recent results history with filters.
  • Account settings and logout/delete flow.

Phase 3: Notifications and Admin Tools · Weeks 8–10

  • Push notification opt-in and reminder workflow.
  • Admin dashboard for scheduled rounds and manual result management.
  • Operational monitoring and error alerting.
  • Role-based access control for admin users.

Phase 4: Optimization and Trust · Weeks 11–12

  • Performance tuning for peak round traffic.
  • Accessibility improvements and color-blind-safe UI polish.
  • Analytics dashboards for conversion and retention.
  • Rollback and incident handling improvements.

Paste this into Cursor, Bolt, Lovable, or v0 to start building.

Build a mobile-first web app called ShadeWin for live timed prediction rounds. The product shows a countdown to the next round, lets users pick a prediction mode (color, number bucket 0–4 or 5–9, and big/small), submits predictions before the round closes, and reveals the result instantly when the timer ends.

Core screens:
1) Live Round screen with server-synced countdown, round status, primary prediction buttons, submit state, and result reveal area
2) History screen with last 20 rounds, filters by today / 7 days / custom range, and per-round detail
3) Auth screen using phone OTP or email login
4) Settings screen for notification opt-in, preferences, and account deletion
5) Admin dashboard for creating rounds, publishing results, editing with audit log, pausing rounds, and monitoring health

Data model:
User, Round, Prediction, Result, NotificationPreference, AuditLog, AdminAction
Each Prediction must belong to one User and one Round, be idempotent per round, and store choiceType, choiceValue, submittedAt, and status. Round stores scheduledStart, scheduledEnd, state, and publishedResult. Result stores number, color, bigSmall, and revealedAt.

Technical stack:
Next.js + TypeScript frontend, Node.js backend, PostgreSQL database, Redis for live state/cache, WebSockets or Server-Sent Events for real-time updates, Tailwind CSS for UI, Zod for validation, Prisma for ORM, Sentry for error tracking, PostHog/GA4 for analytics, and OneSignal or Firebase Cloud Messaging for push notifications.

Implementation requirements:
- Server-authoritative countdown and round state
- Client UI must update without full reloads
- Handle late submissions with clear validation messages
- Show stale/offline state if sync fails
- Make the design clean, high-contrast, mobile-first, and accessible
- Add role-based admin access and audit logging for all result changes
- Include seeded demo data and a simple deployment path

Build the full app scaffold with realistic components, API routes, database schema, and sample pages so it can be extended into production.

Business Idea

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