Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
Plan your Japan trip on a budget
$2.99 · In-app purchases
Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Japan on a Budget: JOAB: map the core Travel workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Assumption to check: Limited offline functionality for travel planning.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficulty in managing multiple itineraries.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited budget tracking features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Complex subscription model may confuse users.
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Plan your Japan trip on a budget. Works 100% offline. No subscription. Japan on a Budget (JOAB) is the Japan travel planner built for budget travelers. Browse curated Japan itineraries, remix any trip and make it yours — or build your own. No PDFs. No subscriptions. No WiFi needed. Stop spending hours on Japan trip planning. JOAB keeps it simple — no overwhelming features, no cluttered dashboards. Just your itinerary, your spots, and your budget, clean and focused. Need more detail? Just ask AI, even offline. PERFECT FOR: - First-time Japan travelers overwhelmed by planning - Budget travelers who want real cost breakdowns of must tries in Japan - Anime fans looking for pilgrimage locations - Anyone tired of paying for a static PDF that barely works on your phone 10 READY-TO-USE HAND-CURATED ITINERARIES: 1) 7 Days Tokyo + Kyoto Classic — The perfect first-timer trip covering Tokyo's energy and Kyoto's tradition 2) 5 Days Osaka Food Adventure — Eat your way through Osaka with side trips to Kobe and Nara 3) 10 Days Ultimate Japan — Tokyo, Kyoto, Osaka and Hiroshima — the full Japan experience on a budget 4) 3 Days Tokyo Anime & Culture — Akihabara, Nakano Broadway and Shimokitazawa for anime and pop culture lovers 5) 4 Days Kyoto Deep Dive — Temples, markets and hidden streets. Slow-paced and culture-focused 6) 7 Days Cherry Blossom Japan — Chase peak Sakura bloom from Tokyo to Kyoto with hanami picnics and night illuminations 7) 7 Days Autumn Leaves Japan — Fiery reds and golden temples from Nikko to Kyoto 8) 6 Days Summer Festivals Japan — Matsuri season across Osaka, Kyoto and Tokyo. Street food and yukata nights 9) 5 Days Winter Hokkaido — Snow-covered Sapporo, Otaru canals and mountain onsen. Miso ramen and soup curry 10) "Your Name" Pilgrimage — Walk in the footsteps of Taki and Mitsuha across Tokyo, Gifu and Nagano WHY JOAB? 1) 10 curated Japan travel itineraries — Tokyo, Kyoto, Osaka, Hiroshima, Hokkaido, Nara, Fukuoka, Okinawa and more. Hand-picked routes for budget travelers. 2) Remix any Japan itinerary — Copy any trip and customize every spot, day and budget. Edit anything, swap days, add your own stops. 3) Build your own Japan itinerary — Pick curated day blocks by city, vibe or activity. Mix Kyoto temples with Osaka street food. Or simply answer 4 questions and we'll build it for you. 4) Real costs for every spot — See exact budget estimates before you go. No hidden fees, no surprises. Plan your Japan trip on a budget with confidence. 5) Plan Day Route — Tap once to open all your day's spots as a multi-stop route in Apple Maps. No manual searching, no copy-pasting addresses. 6) Ask AI anything — Ask about your Japan itinerary, budget tips, or what to pack. Powered by Apple Intelligence. Works 100% offline and stays completely private. 7) Home screen widgets — See your trip countdown, today's spots and daily budget right on your iPhone home screen. Always up to date. 8) 100% offline — No WiFi, no data, no roaming charges needed. Works anywhere in Japan — including the Shinkansen and rural areas. 9) No account needed — No login, no signup, no setup. Open the app and start planning your Japan trip instantly. 10) One-time purchase — Pay once, use forever. No subscription. No ads. JOAB is built to make Japan travel planning feel simple, clear and actually enjoyable — whether you're a first-time visitor or planning your third trip.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.