PULSE

Most training apps hand you a static template and call it a plan. PULSE starts the other way around: a per-sport questionnaire feeds an AI coach that writes a program specifically for you — across ten sports, from calisthenics and powerlifting to BJJ, swimming, and football. The plan then becomes the app itself: your Today tab, your live sessions, your streak.

It began under a different name (REDLINE) and was renamed after a research pass through trademark crowding, competitor collisions, and phonetics. PULSE won — and the heartbeat became the brand: an ECG wordmark, an ECG generation sequence, an ECG design motif used only where it truly earns its place.

• Product & UX — onboarding flow, per-sport questionnaires, the tap-to-log session model, and the decision to delay monetization until the product earns it.
• Mobile engineering — the React Native / Expo app: navigation, state, persistence, typography system, and a full EN/AR i18n layer with correct RTL behavior.
• Motion design — a deliberate budget of hero moments built with Reanimated and SVG: the narrated ECG generation, the Day-1 stamp, the session-complete reward.
• Backend & infrastructure — a Cloudflare Worker that fronts the Anthropic API with per-IP rate limiting and an app-token guard, so no key ever ships inside the app.

The app runs on Expo Go with the SDK pinned — which means no custom native modules, no Skia, no Lottie, no confetti libraries. That constraint became the design system: every animation is built from Reanimated transforms, react-native-svg, and haptics, with spring physics and a 400–500ms budget. If a moment can't be made premium inside those rules, it doesn't ship.

The AI layer is deliberately thin on the client. The app talks to a single hardened Worker endpoint; the Worker holds the secrets, enforces a per-IP limit of 30 requests per minute, and rejects anything without the shared app token. Fast model for coaching responses, structured output for programs.

Monetization exists as a finished strategy — free-first, annual-led trial, paywall only after a first win — and is deliberately parked until the app has real users. Shipping the product comes first.

• AI program generation per sport — questionnaire → generation → personalized reveal with "receipts" showing exactly what the plan adapted to.
• A narrated ECG generation sequence — the app draws a live ECG while it explains what it's building, turning dead waiting time into the product's signature moment.
• Live workout logging — tap a set to accept the AI's target, expand to edit it; AMRAP sets auto-focus the rep field.
• A rest timer with keep-awake, previous-performance prefill, a session progress ring, and a session-complete reward animation.
• Streaks and session history, body-profile math (Mifflin-St Jeor), an AI recipe generator on the Food tab, and a typography system applied app-wide.

PULSE is live on the App Store as Pulse: Workout & Meals. The full loop shipped — onboarding → sport pick → questionnaire → AI generation → Today tab → live sessions with streaks and history — with no account required and core tracking working fully offline. A companion brand site (Next.js 15 on Vercel, with a Supabase-backed lead funnel and admin dashboard) runs alongside it. Monetization stays deliberately off until the app earns real users.