Finance-Fitness Dual-Tracker App -- 2

I’m building a mobile experience that lets users strengthen both their trading discipline and their body in one place. The app has to land on iOS and Android from day one, share a single code-base where possible, and feel truly native on each platform.

Core flow
• Each morning the user receives a concise technical and fundamental market brief, followed by a short workout or recovery routine matched to that day’s intensity.
• They set parallel targets—profit percentage or dollar gain on the trading side, reps or distance on the fitness side—and see them plotted together.
• Wearable fitness trackers feed heart-rate and calorie data directly into the app, while connected brokerage accounts stream live positions and P&L.
• End-of-week the app lays out a side-by-side report: portfolio growth, workout consistency, and suggested tweaks. Push goes out via in-app, email, and any linked social channel.

Key integrations I need out-of-the-box
– Apple Health / Google Fit and the major wristbands for steps, heart rate, and calories.
– At least one mainstream trading API (Alpaca, Interactive Brokers, or equivalent) to pull real-time quotes and execute sample trades.
– Social and email hooks for milestone alerts.

Acceptance criteria
1. Smooth sign-up, OAuth for both broker and wearable connections.
2. Daily feed combining technical chart snapshots with company-level fundamental bullet points.
3. Workout generator that adapts to yesterday’s logged activity and today’s calendar availability.
4. React-Native or Flutter build that compiles cleanly for App Store and Google Play review.
5. Unit-tested codebase and a short Loom walkthrough so I can demo to stakeholders in under five minutes.

If you’ve shipped cross-platform mobile apps that juggle data from both fitness and finance APIs, I’d love to see your approach and a rough timeline.