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.
Transform your iPhone and iPad into a head-up display for any car with HUD Nav - Turn by turn Head up display navigation.
$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 HUD Nav: 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: Difficulty in finding specific locations or addresses.
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: Voice navigation can be unclear.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of customization for map views.
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.
Transform your iPhone and iPad into a head-up display for any car with HUD Nav - Turn by turn Head up display navigation. Look for a location, chose a route and place your iPhone/iPad on the dashboard — you’ll see the directions, distances, and other information, reflected on your windshield. Drive safer and keep your eyes on the road, and know in advance what’s ahead. Features: - Watch the direction and distance to the next turn, right on the windshield - HUD interfaces with clear, simple and non-distracting information that you understand immediately - Double tap the HUD to change the information displayed. 6 different modes are available: + Direction and distance to the next turn + Direction, road/street name, and distance to the next turn + Direction and distance to the next turn, remaining distance to destination and expected time arrival (ETA) + Detailed direction, road/street name, and distance to the next turn + Map, direction and distance to the next turn + Map, direction, road/street name, and distance to the next turn - Get voice instructions and drive with a co-pilot - Choose the voice that guides you (available in some languages) - Motorcycle mode: the HUD is not mirrored so you can use the app while riding your bike, or driving in bright conditions - Save places and locations in the Historic to quickly drive to them later. Edit your historic and rename places/locations, organize them or delete them - Works with Apple Maps app: send routes from Maps to the app, and drive them with the app HUD Note! - On a clear day or bright conditions, the device screen brightness is typically insufficient to give a decent reflection for HUD mode. In that situation, you can use the app in motorcycle mode with the phone fixed with some mount. At night, in dusk, or in dull weather the reflection is normally well-discernible. - When driving, make sure that your iPhone or iPad is well fixed in some mount or on some sticky pad, and doesn't prevent you from clearly seeing the road. Continued use of GPS running in the background can quickly drain your device battery. Note that the app uses the same "route search engine" as the Maps app. However, as not all the iOS features are available in all countries, you can check the list of features available for your country at https://www.apple.com/ae/ios/feature-availability/. If you face any problems or find any bugs, please email us at [email protected] or report the bug right from the app. We appreciate your feedback! Check out our other iPhone and iPad apps at www.seb-appstore.com, with hundreds of discounted and free apps.
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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.