Enter destination + dates + activities (e.g. "Tokyo, 7 days, hiking + business meetings + fancy dinner") → AI returns customized packing list with weather forecast (free OpenMeteo) baked in, smart sub-categories (carry-on vs check-in), TSA size flags, optimal compression order. Offline export to Notes/Apple Reminders/Google Tasks.

What we ship

**Core features (MVP)**

• Single-screen form: destination (autocomplete), dates, activities (multi-select chips: hiking, beach, business, fancy-dinner, gym, etc).
• Claude Sonnet 4.6 + OpenMeteo (free) generates structured JSON list: items, qty, sub-category (clothing/electronics/toiletries/documents), carry-on vs check-in flag, TSA size flag.
• One-tap export to Apple Reminders / Google Tasks / plain-text via Web Share API — app is not required after generation.
• Free tier: 1 trip/mo, ~10 items basic. Premium: unlimited + weather + activity-mix + flags + export.
• PWA + offline-first: once generated, list is available without internet.

**Primary user flow**

1. User finds us via SEO "packing list generator" / ProductHunt.

2. No signup: enters "Tokyo / Aug 10-17 / hiking + business" → sees first 10 items free.

3. To unlock full list (~40 items) + weather + flags → pays $1.99 per-trip OR $4.99 lifetime.

4. Stripe checkout → full list → one-tap export to Apple Reminders.

**What it looks like**

• **Landing**: split hero. Left: "PackPoint died in 2019. Your trip didn't." Right: animated mockup — user enters "Tokyo + hiking + business" and list fills in real-time.
• **Main screen**: list view with categories (Clothing, Electronics, Toiletries, Documents); each item has qty, carry-on/check-in chip, TSA flag if applicable.
• **Output format**: lists export to Apple Reminders as checklist, Google Tasks as list, or plain text via Web Share API.

**MVP build plan (9 days)**

• Day 1-2: FastAPI + Postgres on Railway, Stripe one-time + subscription, OpenMeteo API integration (geocoding + 7-day forecast).
• Day 3-4: Form + autocomplete (city via Nominatim free), activity chips, Claude Sonnet structured JSON prompt engineering.
• Day 5-6: List UI (React PWA), Tailwind, category grouping, TSA flag logic.
• Day 7: Export integrations (Apple Reminders deep-link, Google Tasks API optional, Web Share API fallback).
• Day 8: Landing + pricing page, paywall logic (10 items free, full list paid).
• Day 9: ProductHunt assets, smoke tests, Stripe webhook production, ship.

Source signals

• `SIG-20260504-global-hobbyist-utility-ai-packing-list` — Roaming Cactus 2025 confirms packing as universal anxiety; PackPoint 1M+ Android downloads + 4.3-star rating with persistent 1-star reviews citing "lists are too generic" — validated wedge

Reasoning

PackPoint is a literal validated wedge: 1M+ Android installs, 4.3-star, and 1-star reviews with a recurring pattern of "lists are too generic". That tells us (a) the market exists and pays, (b) the current leader has been abandoned since 2019, (c) users explicitly articulate the gap.

Why now: Claude Sonnet 4.6 + free OpenMeteo API turn "packing for Tokyo, 7 days, hiking + business meetings" into a structured JSON list with categories for $0.02 per request. Six years ago this required a custom rules engine with thousands of hand-coded rules — exactly what PackPoint tried to build and abandoned.

Differentiation: (a) weather-aware list (Tokyo rain in your dates → adds rain shell; 35°C → light linen); (b) activity mix (hiking + business + fancy dinner → adds trail runners + dress shirt + leather loafers without confusing categories); (c) TSA size flags (auto-marks "toothpaste >100ml = check-in only"); (d) offline export to native systems (Apple Reminders / Google Tasks) removes the app-as-lock-in.

Gross margin profile: $4.99 lifetime × $0.04 LLM cost = 99% gross margin. Solo-build in 9 days. SEO "packing list generator" — 1M+ monthly searches, low competition.

Quick competitive read

Direct competitors — low density (3 named, each with a specific weakness):

• **PackPoint** (free + $2.99 one-time, 11 yrs old): leader-by-default, abandoned since 2019; generic templated checklists; no AI; no weather integration that drives actual contents.
• **Stylebook** ($3.99 one-time, 12 yrs old): wardrobe-organizer, not travel-specific; manual outfit planning, no AI list generation, no destination/weather context.
• **Google Tasks** (free, 8 yrs old): generic to-do; manual entry; no travel templates; no AI; no weather.

White-space: AI-native + weather-aware + activity-mix + TSA flags + offline export to Apple/Google systems — empty.

Initial pricing hypothesis

$0 free for 1 trip/mo + basic list (~10 items), $1.99 per-trip premium (full list + weather + offline export), $4.99 lifetime upgrade (unlimited trips, cross-device sync, priority support). No subscription — users pay once and own it. Anchored to developed-tier hobbyist-utility $1-10 one-time pattern (taxonomy.yaml).

Distribution hypothesis

ProductHunt launch + SEO long-tail on "packing list generator", "what to pack for Tokyo in winter". Communities: r/solotravel, r/onebag, r/travelhacks, r/digitalnomad — post "I built X because PackPoint died in 2019". TikTok travel-content creator outreach (lifestyle inspiration → app demo). After 500 paying — App Store / Google Play submission (PWA → wrap as native).