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.
Speed up your next border check with the Travel to Europe app.
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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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 Travel to Europe: 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 search filters
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent listing quality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Difficult booking process
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of personalized recommendations
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.
Speed up your next border check with the Travel to Europe app. Developed by the European Union, Travel to Europe allows you to pre-register your personal information for the Entry/Exit System (EES) in advance. Secure and simple to use, you can complete your pre-registration before arriving in or leaving a European country using the EES. The app is voluntary for the countries using the EES: they can choose whether to adopt it for EES pre-registration and the specific functionalities of the app may vary from country to country. For the up-to-date list of countries using the app, visit: https://travel-europe.europa.eu/ees/Travel-to-Europe-mobile-app Who can use the app? You can use Travel to Europe if you are a non-EU national subject to EES travelling to a European Country using the EES and you have: • A biometric passport • iPhone 8 or later with iOS 16 or later • NFC (Near-Field Communication) functionality, in order to scan your passport chip • A front-facing camera to take a selfie for identity verification You shouldn't use the app if you hold a residence permit or a long-stay visa issued by a European country using the EES. To read more about whom the EES does not apply to and therefore shall not use the app please visit https://travel-europe.europa.eu/ees/to-whom-does-ees-not-apply How to use the app? 1. Create a new journey by selecting the European country using the EES you are arriving in or departing from 2. Select the border crossing point and the time of your expected arrival or departure 3. Scan the personal details page and the chip of your passport 4. Take a selfie to confirm your identity 5. Answer a few questions about your travel plans (if applicable) 6. Optional: add co-travellers using steps 1-5 7. Submit your journey 8. Receive a confirmation that your journey has been accepted 9. Go to the border crossing point and follow the border guard’s instructions Using the app does not replace checks by the border authorities and does not guarantee entry into the European countries using the EES. The final decision on entry can only be taken by the local border authorities based on whether you fulfil the entry conditions. Learn more information about the EES at: https://travel-europe.europa.eu/ees.
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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.