1# StockPulse - Commercial Product Roadmap
2 
3## Vision
4 
5Transform the stock-analysis skill into **StockPulse**, a commercial mobile app for retail investors with AI-powered stock and crypto analysis, portfolio tracking, and personalized alerts.
6 
7## Technical Decisions
8 
9- **Mobile:** Flutter (iOS + Android cross-platform)
10- **Backend:** Python FastAPI on AWS (ECS/Lambda)
11- **Database:** PostgreSQL (RDS) + Redis (ElastiCache)
12- **Auth:** AWS Cognito or Firebase Auth
13- **Monetization:** Freemium + Subscription ($9.99/mo or $79.99/yr)
14 
15---
16 
17## Architecture Overview
18 
19```
20┌─────────────────────────────────────────────────────────────────┐
21│                      MOBILE APP (Flutter)                        │
22│  ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐           │
23│  │Dashboard │ │Portfolio │ │ Analysis │ │ Alerts   │           │
24│  └──────────┘ └──────────┘ └──────────┘ └──────────┘           │
25└─────────────────────────────────────────────────────────────────┘
26                              │ HTTPS/REST
27                              ▼
28┌─────────────────────────────────────────────────────────────────┐
29│                      API GATEWAY (AWS)                           │
30│                   Rate Limiting, Auth, Caching                   │
31└─────────────────────────────────────────────────────────────────┘
32                              │
33                              ▼
34┌─────────────────────────────────────────────────────────────────┐
35│                   BACKEND (FastAPI on ECS)                       │
36│  ┌──────────────┐ ┌──────────────┐ ┌──────────────┐            │
37│  │ Auth Service │ │ Analysis API │ │ Portfolio API│            │
38│  └──────────────┘ └──────────────┘ └──────────────┘            │
39│  ┌──────────────┐ ┌──────────────┐ ┌──────────────┐            │
40│  │ Alerts Svc   │ │ Subscription │ │ User Service │            │
41│  └──────────────┘ └──────────────┘ └──────────────┘            │
42└─────────────────────────────────────────────────────────────────┘
43                              │
44        ┌─────────────────────┼─────────────────────┐
45        ▼                     ▼                     ▼
46┌──────────────┐     ┌──────────────┐     ┌──────────────┐
47│  PostgreSQL  │     │    Redis     │     │     S3       │
48│   (RDS)      │     │ (ElastiCache)│     │  (Reports)   │
49└──────────────┘     └──────────────┘     └──────────────┘
50 
51                    BACKGROUND WORKERS (Lambda/ECS)
52┌─────────────────────────────────────────────────────────────────┐
53│  ┌──────────────┐ ┌──────────────┐ ┌──────────────┐            │
54│  │Price Updater │ │Alert Checker │ │Daily Reports │            │
55│  │  (5 min)     │ │  (1 min)     │ │  (Daily)     │            │
56│  └──────────────┘ └──────────────┘ └──────────────┘            │
57└─────────────────────────────────────────────────────────────────┘
58```
59 
60---
61 
62## Feature Tiers
63 
64### Free Tier
65- 1 portfolio (max 10 assets)
66- Basic stock/crypto analysis
67- Daily market summary
68- Limited to 5 analyses/day
69- Ads displayed
70 
71### Premium ($9.99/mo)
72- Unlimited portfolios & assets
73- Full 8-dimension analysis
74- Real-time price alerts
75- Push notifications
76- Period reports (daily/weekly/monthly)
77- No ads
78- Priority support
79 
80### Pro ($19.99/mo) - Future
81- API access
82- Custom watchlists
83- Advanced screeners
84- Export to CSV/PDF
85- Portfolio optimization suggestions
86 
87---
88 
89## Development Phases
90 
91### Phase 1: Backend API
92 
93**Goal:** Convert Python scripts to production REST API
94 
95#### Tasks:
961. **Project Setup**
97   - FastAPI project structure
98   - Docker containerization
99   - CI/CD pipeline (GitHub Actions)
100   - AWS infrastructure (Terraform)
101 
1022. **Core API Endpoints**
103   ```
104   POST /auth/register
105   POST /auth/login
106   POST /auth/refresh
107 
108   GET  /analysis/{ticker}
109   POST /analysis/batch
110 
111   GET  /portfolios
112   POST /portfolios
113   PUT  /portfolios/{id}
114   DELETE /portfolios/{id}
115 
116   GET  /portfolios/{id}/assets
117   POST /portfolios/{id}/assets
118   PUT  /portfolios/{id}/assets/{ticker}
119   DELETE /portfolios/{id}/assets/{ticker}
120 
121   GET  /portfolios/{id}/performance?period=weekly
122   GET  /portfolios/{id}/summary
123 
124   GET  /alerts
125   POST /alerts
126   DELETE /alerts/{id}
127 
128   GET  /user/subscription
129   POST /user/subscription/upgrade
130   ```
131 
1323. **Database Schema**
133   ```sql
134   users (id, email, password_hash, created_at, subscription_tier)
135   portfolios (id, user_id, name, created_at, updated_at)
136   assets (id, portfolio_id, ticker, asset_type, quantity, cost_basis)
137   alerts (id, user_id, ticker, condition, threshold, enabled)
138   analysis_cache (ticker, data, expires_at)
139   subscriptions (id, user_id, stripe_id, status, expires_at)
140   ```
141 
1424. **Refactor Existing Code**
143   - Extract `analyze_stock.py` into modules:
144     - `analysis/earnings.py`
145     - `analysis/fundamentals.py`
146     - `analysis/sentiment.py`
147     - `analysis/crypto.py`
148     - `analysis/market_context.py`
149   - Add async support throughout
150   - Implement proper caching (Redis)
151   - Rate limiting per user tier
152 
153#### Files to Create:
154```
155backend/
156├── app/
157│   ├── main.py              # FastAPI app
158│   ├── config.py            # Settings
159│   ├── models/              # SQLAlchemy models
160│   ├── schemas/             # Pydantic schemas
161│   ├── routers/             # API routes
162│   │   ├── auth.py
163│   │   ├── analysis.py
164│   │   ├── portfolios.py
165│   │   └── alerts.py
166│   ├── services/            # Business logic
167│   │   ├── analysis/        # Refactored from analyze_stock.py
168│   │   ├── portfolio.py
169│   │   └── alerts.py
170│   └── workers/             # Background tasks
171├── tests/
172├── Dockerfile
173├── docker-compose.yml
174└── requirements.txt
175```
176 
177---
178 
179### Phase 2: Flutter Mobile App
180 
181**Goal:** Build polished cross-platform mobile app
182 
183#### Screens:
1841. **Onboarding** - Welcome, feature highlights, sign up/login
1852. **Dashboard** - Market overview, portfolio summary, alerts
1863. **Analysis** - Search ticker, view full analysis, save to portfolio
1874. **Portfolio** - List portfolios, asset breakdown, P&L chart
1885. **Alerts** - Manage price alerts, notification settings
1896. **Settings** - Account, subscription, preferences
190 
191#### Key Flutter Packages:
192```yaml
193dependencies:
194  flutter_bloc: ^8.0.0      # State management
195  dio: ^5.0.0               # HTTP client
196  go_router: ^12.0.0        # Navigation
197  fl_chart: ^0.65.0         # Charts
198  firebase_messaging: ^14.0.0  # Push notifications
199  in_app_purchase: ^3.0.0   # Subscriptions
200  shared_preferences: ^2.0.0
201  flutter_secure_storage: ^9.0.0
202```
203 
204#### App Structure:
205```
206lib/
207├── main.dart
208├── app/
209│   ├── routes.dart
210│   └── theme.dart
211├── features/
212│   ├── auth/
213│   │   ├── bloc/
214│   │   ├── screens/
215│   │   └── widgets/
216│   ├── dashboard/
217│   ├── analysis/
218│   ├── portfolio/
219│   ├── alerts/
220│   └── settings/
221├── core/
222│   ├── api/
223│   ├── models/
224│   └── utils/
225└── shared/
226    └── widgets/
227```
228 
229---
230 
231### Phase 3: Infrastructure & DevOps
232 
233**Goal:** Production-ready cloud infrastructure
234 
235#### AWS Services:
236- **ECS Fargate** - Backend containers
237- **RDS PostgreSQL** - Database
238- **ElastiCache Redis** - Caching
239- **S3** - Static assets, reports
240- **CloudFront** - CDN
241- **Cognito** - Authentication
242- **SES** - Email notifications
243- **SNS** - Push notifications
244- **CloudWatch** - Monitoring
245- **WAF** - Security
246 
247#### Terraform Modules:
248```
249infrastructure/
250├── main.tf
251├── variables.tf
252├── modules/
253│   ├── vpc/
254│   ├── ecs/
255│   ├── rds/
256│   ├── elasticache/
257│   └── cognito/
258└── environments/
259    ├── dev/
260    ├── staging/
261    └── prod/
262```
263 
264#### Estimated Monthly Costs (Production):
265| Service | Est. Cost |
266|---------|-----------|
267| ECS Fargate (2 tasks) | $50-100 |
268| RDS (db.t3.small) | $30-50 |
269| ElastiCache (cache.t3.micro) | $15-25 |
270| S3 + CloudFront | $10-20 |
271| Other (Cognito, SES, etc.) | $20-30 |
272| **Total** | **$125-225/mo** |
273 
274---
275 
276### Phase 4: Payments & Subscriptions
277 
278**Goal:** Integrate Stripe for subscriptions
279 
280#### Implementation:
2811. Stripe subscription products (Free, Premium, Pro)
2822. In-app purchase for iOS/Android
2833. Webhook handlers for subscription events
2844. Grace period handling
2855. Receipt validation
286 
287#### Stripe Integration:
288```python
289# Backend webhook handler
290@router.post("/webhooks/stripe")
291async def stripe_webhook(request: Request):
292    event = stripe.Webhook.construct_event(...)
293 
294    if event.type == "customer.subscription.updated":
295        update_user_tier(event.data.object)
296    elif event.type == "customer.subscription.deleted":
297        downgrade_to_free(event.data.object)
298```
299 
300---
301 
302### Phase 5: Push Notifications & Alerts
303 
304**Goal:** Real-time price alerts and notifications
305 
306#### Alert Types:
307- Price above/below threshold
308- Percentage change (daily)
309- Earnings announcement
310- Breaking news (geopolitical)
311- Portfolio performance
312 
313#### Implementation:
314- Firebase Cloud Messaging (FCM)
315- Background worker checks alerts every minute
316- Rate limit: max 10 alerts/day per free user
317 
318---
319 
320### Phase 6: Analytics & Monitoring
321 
322**Goal:** Track usage, errors, business metrics
323 
324#### Tools:
325- **Mixpanel/Amplitude** - Product analytics
326- **Sentry** - Error tracking
327- **CloudWatch** - Infrastructure metrics
328- **Custom dashboard** - Business KPIs
329 
330#### Key Metrics:
331- DAU/MAU
332- Conversion rate (free → premium)
333- Churn rate
334- API response times
335- Analysis accuracy feedback
336 
337---
338 
339## Security Considerations
340 
3411. **Authentication**
342   - JWT tokens with refresh rotation
343   - OAuth2 (Google, Apple Sign-In)
344   - 2FA optional for premium users
345 
3462. **Data Protection**
347   - Encrypt PII at rest (RDS encryption)
348   - TLS 1.3 for all API traffic
349   - No plaintext passwords
350 
3513. **API Security**
352   - Rate limiting per tier
353   - Input validation (Pydantic)
354   - SQL injection prevention (SQLAlchemy ORM)
355   - CORS configuration
356 
3574. **Compliance**
358   - Privacy policy
359   - Terms of service
360   - GDPR data export/deletion
361   - Financial disclaimer (not investment advice)
362 
363---
364 
365## Risks & Mitigations
366 
367| Risk | Impact | Mitigation |
368|------|--------|------------|
369| Yahoo Finance rate limits | High | Implement caching, use paid API fallback |
370| App store rejection | Medium | Follow guidelines, proper disclaimers |
371| Data accuracy issues | High | Clear disclaimers, data validation |
372| Security breach | Critical | Security audit, penetration testing |
373| Low conversion rate | Medium | A/B testing, feature gating |
374 
375---
376 
377## Success Metrics (Year 1)
378 
379| Metric | Target |
380|--------|--------|
381| App downloads | 10,000+ |
382| DAU | 1,000+ |
383| Premium subscribers | 500+ |
384| Monthly revenue | $5,000+ |
385| App store rating | 4.5+ stars |
386| Churn rate | <5%/month |
387 
388---
389 
390## Next Steps (Immediate)
391 
3921. **Validate idea** - User interviews, landing page
3932. **Design** - Figma mockups for key screens
3943. **Backend MVP** - Core API endpoints
3954. **Flutter prototype** - Basic app with analysis feature
3965. **Beta testing** - TestFlight/Google Play beta
397 
398---
399 
400## Repository Structure (Final)
401 
402```
403stockpulse/
404├── backend/                 # FastAPI backend
405│   ├── app/
406│   ├── tests/
407│   ├── Dockerfile
408│   └── requirements.txt
409├── mobile/                  # Flutter app
410│   ├── lib/
411│   ├── test/
412│   ├── ios/
413│   ├── android/
414│   └── pubspec.yaml
415├── infrastructure/          # Terraform
416│   ├── modules/
417│   └── environments/
418├── docs/                    # Documentation
419│   ├── api/
420│   └── architecture/
421└── scripts/                 # Utility scripts
422```
423 
424---
425 
426## Timeline Summary (Planning Only)
427 
428| Phase | Duration | Dependencies |
429|-------|----------|--------------|
430| 1. Backend API | 4-6 weeks | - |
431| 2. Flutter App | 6-8 weeks | Phase 1 |
432| 3. Infrastructure | 2-3 weeks | Phase 1 |
433| 4. Payments | 2 weeks | Phase 2, 3 |
434| 5. Notifications | 2 weeks | Phase 2, 3 |
435| 6. Analytics | 1 week | Phase 2 |
436| **Total** | **17-22 weeks** | |
437 
438This is a planning document. No fixed timeline - execute phases as resources allow.
439 
440---
441 
442**Disclaimer:** This tool is for informational purposes only and does NOT constitute financial advice.
443