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.
CarPlay Support!
$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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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 R4 Companion: map the core Utilities 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 features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Occasional bugs with device connection
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No offline support
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High subscription cost for basic features
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.
CarPlay Support! NOTE: R4 Companion™ requires a Uniden R4 or R4w radar detector with US Version 142 (R4) or 127 (R4w) firmware to function correctly. R4 Companion will NOT function correctly without at least this version of firmware. R4 Companion™ is a feature rich app, designed to give you the most out of your R4, while enhancing your driving experience along the way. Featuring intelligent alerts and advanced muting! R4 Companion™ is the COMPLETE solution to enjoying your R4. SpotLock 2.0 and Advanced False Assist 3.0. Both data driven systems have been updated using 5 years of historical data. This takes your detector to a whole new level of quietness and safety against real threats. The R4 Companion™ app leverages years of optimizations and features from the Radar Companion™ series of apps. (Available separately for owners of the V1, R8, R9, & DS1 radar detectors). Enhanced GPS location based 'false muting' via SpotLocks™ - All future updates to this app are free to purchasers of R4 Companion™ R4 Companion™ feature list: • SpotLocks™ - Location based false silencing has never been this good or easy. Turn on the intelligent location-based learning and let R4 Companion™ do the rest. Or you can manually 'lock' or 'unlock' locations with ease from the main alert screen. • Full navigation functionality in preparation for future CarPlay integration. • New alert screen (portrait & landscape views). • Posted speed limit displayed on main alert screen (US, CA, AU, NZ). • Customizable low speed muting based on PSL. • Quickly switch back from navigation screen to classic alert details screen. • Works seamlessly with the R4's auto mute memory, manual mute memory, k-block, and quiet-ride built in muting. • Option to play detector tones in app. • Ability to set R4’s internal detector settings from the app. *Requires US Version 142 (R4) 127 (R4w) firmware. • SpotLocks™ works seamlessly with your R4’s built in 'auto mute memory' locations. If you create or delete a location from the app it will apply the changes to your R4 at the same time. • 'Proximity' meter - leverages the high resolution signal strength to show you a better representation of the signal's source. • 'K & X falses in area' meter shows you how many possible false alerts exist in the area you are traveling based on the accumulated SpotLock data™. • 'Custom Phrases' for a given threat's audio announcements. • High resolution meters for the priority alert (Not limited to the # of bars on the R4 display). • Customizable heads-up display (HUD). • HUD displays the priority alert's band, signal strength, frequency. The HUD is color coded between real threats & muted false signals. • HUD of the secondary alerts' bands, signal strengths, frequencies, & bogey counts. • Advanced BSM/CAS/Ka False Muting (Optimized for the R4 platform). • 'Ghost' muting quiets false alerts when you are stuck traveling near a false emitting vehicle. • "Passive Mute™"- Quiets the R4 below user set speeds & during weak K & X signals. • Bogey count display showing total number of threats. • Vehicle speed display. Speed is color coded for each alert type. • Mute status with the ability to manually mute/unmute alerts as you need. • Detailed & intelligent voice announcements of band, frequency, strength, number of alerts, occurrences of mixed signals and more. • Automatic muting of Ka, K, and X bands ('Time before mute' set for each band). • 'Reduce Speed' notification for user set speed. • ‘Urgency Alerts™’ - Unmutes growing threats & announces these alerts via voice & notifications. • ‘Alert History’ - View your past alerts with detailed information. • Compass heading. • Detailed trip summary including duration, distance, alerts, muting stats, battery, and more. • Automatic and seamless connection via Bluetooth even while the app is in the background. • iPhone & Apple Watch notifications of Band, & Frequency of each alert. • Help system.
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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.