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.
* Unlimited free map downloads based on Ordnance Survey® OpenData, at 1:25,000 and 1:10,000 scales, and now also paid map downloads at 1:50,000, 1:25,000 and 1:10,000 scales, just like the paper maps
$9.99 · 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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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 UK Map: 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: Inaccurate mapping data
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Cluttered user interface
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent performance
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.
* Unlimited free map downloads based on Ordnance Survey® OpenData, at 1:25,000 and 1:10,000 scales, and now also paid map downloads at 1:50,000, 1:25,000 and 1:10,000 scales, just like the paper maps. * 3D mode ideal for mountains. * Maps downloaded and saved for off-line use. * Mark waypoints, plan routes and record tracks. * Import and export GPX files. * Plot graphs of altitude and speed. * View your photos on the map. * Off-line place, street name and postcode search. After installing the app, please touch the '?' button to view instructions including how to download detailed maps. Northern Ireland is not included. The Isle of Man is included only at 1:250,000 (free) and 1:50,000 (paid). The Channel Islands are not included. Since 2010, Britain's national mapping agency Ordnance Survey has released a large amount of free map data. UK Map makes much of that data available in a single app. It includes 1:1M MiniScale® and 1:250k road maps, which are built into the app, and 1:25k district maps and 1:10k street maps for the entire country which you can download in 5km by 5km tiles. As the free O.S. data does not include footpaths, this app superimposes footpaths derived from volunteer-collected data from OpenStreetMap.org. These downloads are free of charge. In addition to the free maps, you can also purchase and download 1:50,000 and 1:25,000 maps that are just like the Ordnance Survey paper maps. You can also purchase 1:10,000 maps for selected urban areas which show more detail than the free 1:10,000 maps. Once you've downloaded the detailed maps that you need, an internet connection is not required. The app can load GPX files (for example, from websites, other apps and from nearby devices via AirDrop) and display waypoints, tracks and routes. You can also mark waypoints, plan routes and record tracks within the app, and export them. You can view graphs of altitude or speed along recorded tracks and routes. The app has a 3D mode that lets you view the terrain from any viewpoint, useful for visualising hills and mountains. The app also includes a searchable gazetteer containing over 250,000 place names, 850,000 street names and 1.6 million post codes. All of this data is built in to the app, so this search also works when there is no network connection. The app also supports the compass and GPS - on those devices that have them - to display your position, orientation and altitude. Paid maps are licensed for personal and non-commercial use only. Contains Ordnance Survey data © Crown copyright and database rights 2011 - 2024. Please visit the website for more information - https://ukmapapp.com/
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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.