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.
Ride e-scooters/e-bikes at a discount!
Free · 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 LUUP - RIDE YOUR CITY: map the core Navigation 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: Users report difficulty in finding rides during peak hours.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Navigation options can be confusing for new users.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of offline functionality limits usability.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: In-app purchases can be unclear and frustrating.
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.
Ride e-scooters/e-bikes at a discount! "LUUP" is a sharing service that allows you to ride small e-bikes and e-scooters around town from anywhere and return them to the place you choiced. The service is currently available in Tokyo, Osaka, Kyoto, Yokohama, Utsunomiya, Kobe, Nagoya, Hiroshima, Sendai, Fukuoka, Kitakyushu and Hamamatsu! Please use this service for commuting to work, school, shopping, and other places that are a little too far to go on foot! FEATURES 1. No license required! You can ride an e-scooters if you are 16 years old or older! You can ride an e-scooter after passing age verification and a traffic rules test. 2. Complete everything from ride to payment with the app Procedures to use are completed via the app and the ride begins. Payment is also made through the app, so all you need is a mobile phone. 3. Membership registration is free! You can start using it today! You can use the service immediately after downloading. 4. Small but powerful electric assisted bicycles. Although the vehicle is designed to be small, it is powerful, and anyone can ride it stably without getting tired. It is perfect for sightseeing or cycling for a change of pace. 5. High-density parking installation in our service areas Parkings are densely located in the service area, so you can ride right when you want to, without having to walk for a long time to the parking. You can check the parking map from the LUUP app. AREAS OF OPERATION *As of July 2024 Tokyo (Shibuya, Meguro, Minato, Setagaya, Shinagawa, Shinjuku, Chuo, Chiyoda, Koto, Sumida, Taito, Bunkyo, Toshima, Nakano, Suginami, Arakawa, Kita, Ota, Itabashi, Adachi, Mitaka, Musashino) Yokohama City (Kanagawa, Naka and Nishi areas) Osaka (Kita and Minami areas) Kyoto (Kyoto City) Tochigi(Utsunomiya City) Hyogo (Kobe City) Aichi (Nagoya City) Hiroshima(Hiroshima City) Miyagi(Sendai City) Fukuoka(Fukuoka City, Kitakyushu City) Shizuoka(Hamamtsu City) Other areas and nationwide! HOW TO USE LUUP You can use LUUP in [4 steps]! 1. Find LUUP parkings around town You can find parkings on the app's map 2. Use the in-app camera to read the QR code on the vehicle and unlock it Select the parking point for returning before the ride to ensure the return of the vehicle (* You can change the place during the ride) 3. Start the ride to the destination 4. End riding when you take a photo of your LUUP bikes or scooters parked in the parking and make an in-app payment PRICE Prices vary by city and region. Rates for Tokyo, Osaka City: 50 yen (including tax) as basic ride fee + 20 yen per minute (including tax) as time fee Rates for other major areas: 50 yen (including tax) as basic ride fee + 15 yen per minute (including tax) as time fee *Currently, the same fee applies to both e-scooters and bicycles. *Prices may differ in some areas. Please see the LUUP help page for details. NOTES - Credit card registration is required. *The name "loop" is sometimes incorrectly used, but the correct name is "LUUP". *"QR Code" is a registered trademark of DENSO WAVE INCORPORATED.
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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.