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.
App Overview
TechApp for Mercedes
The application contains technical information that will help you in the repair and maintenance of your car.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.8
4 ratings · Below Average
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.
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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for TechApp for Mercedes: map the core Shopping workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Expand product offerings and include user-generated content.
Assumption to check: Limited product selection compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Improve app performance and streamline navigation.
Assumption to check: Inconsistent user experience and slow performance.
Validate with people who use this workflow before building.
Hypothesis 3
Implement live chat or support ticketing system.
Assumption to check: Lack of customer support options.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate more payment options like Apple Pay and PayPal.
Assumption to check: Difficulties in payment processing.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
The application contains technical information that will help you in the repair and maintenance of your car. Data is divided into categories: general information, chassis, tightening torques of bolts and nuts, fuel system, brake system, lighting lamps, a replacement intervals and volumes of technical fluids. Technical data of repair, adjustments, volumes of fluids, service intervals, etc. - comply with the recommendations of the automaker and can’t be the same with your personal opinion, so it’s only for informational purposes. For work needed Internet access. Consumption traffic is little. After first loading the information that interests you data is cached, allowing you to view after it offline. Information is available for the following models: 100 Box (631) 100 Bus (631) 100 Platform/Chassis (631) 190 (W201) A-CLASS (W168) A-CLASS (W169) A-CLASS (W176) B-CLASS (W245) B-CLASS (W246, W242) CABRIOLET (A124) C-CLASS (W205) C-CLASS Coupe (C204) C-CLASS Estate (S202) C-CLASS (W202) C-CLASS (W203) C-CLASS (W204) C-CLASS Sportscoupe (CL203) C-CLASS T-Model (S203) C-CLASS T-Model (S204) C-CLASS T-Model (S205) CITAN Dualiner (415) CITAN Panel Van (415) CITAN Traveliner (415) CLA Coupe (C117) CLA Shooting Brake (X117) CLC-CLASS (CL203) CL-CLASS Coupe (C140) CL-CLASS Coupe (C215) CLK (C208) CLK (C209) CLK Convertible (A208) CLK Convertible (A209) CLS (C218) CLS (C219) CLS Shooting Brake (X218) COUPE (C123) COUPE (C124) E-CLASS Convertible (A124) E-CLASS Convertible (A207) E-CLASS Coupe (C124) E-CLASS Coupe (C207) E-CLASS Estate (S124) E-CLASS Estate (S210) E-CLASS (W124) E-CLASS (W210) E-CLASS (W211) E-CLASS (W212) E-CLASS T-Model (S211) E-CLASS T-Model (S212) G-CLASS (W460) G-CLASS (W461) G-CLASS (W463) G-CLASS Open Off-Road Vehicle (W463) GLA-CLASS (X156) GL-CLASS (X164) GL-CLASS (X166) GLE (W166) GLE Coupe (C292) GLK-CLASS (X204) KOMBI Estate (S123) KOMBI Estate (S124) M-CLASS (W163) M-CLASS (W164) M-CLASS (W166) R-CLASS (W251, V251) Sedan (W123) Sedan (W124) S-CLASS (W222, V222, X222) S-CLASS Coupe (C126) S-CLASS Coupe (C216) S-CLASS Coupe (C217) S-CLASS (W116) S-CLASS (W126) S-CLASS (W140) S-CLASS (W220) S-CLASS (W221) SL (R107) SL (R129) SL (R230) SL (R231) SL Coupe (C107) SLK (R170) SLK (R171) SLK (R172) SLR (R199) SLR ROADSTER (R199) SLS AMG (C197) SLS AMG Convertible (A197) SPRINTER 2-t Box (901, 902) SPRINTER 2-t Bus (901, 902) SPRINTER 2-t Platform/Chassis (901, 902) SPRINTER 3,5-t Box (906) SPRINTER 3,5-t Bus (906) SPRINTER 3,5-t Platform/Chassis (906) SPRINTER 3-t Box (903) SPRINTER 3-t Box (906) SPRINTER 3-t Bus (903) SPRINTER 3-t Bus (906) SPRINTER 3-t Platform/Chassis (903) SPRINTER 3-t Platform/Chassis (906) SPRINTER 4,6-t Box (906) SPRINTER 4,6-t Platform/Chassis (906) SPRINTER 4-t Box (904) SPRINTER 4-t Bus (904) SPRINTER 4-t Platform/Chassis (904) SPRINTER 5-t Box (906) SPRINTER 5-t Platform/Chassis (905) SPRINTER 5-t Platform/Chassis (906) SPRINTER CLASSIC 3,5-t Box (909) SPRINTER CLASSIC 4,6-t Bus (909) SPRINTER Dumptruck (905) T1 Box (601) T1 Box (602) T1 Bus (601) T1 Bus (602) T1 Platform/Chassis (601) T1 Platform/Chassis (602) T1/TN Box Body / Estate T1/TN Platform/Chassis T2/L Box Body / Estate T2/L Dumptruck T2/L Municipal Vehicle T2/L Platform/Chassis T2/L Truck Tractor T2/LN1 Box Body / Estate T2/LN1 Bus T2/LN1 Cab with engine T2/LN1 Dumptruck T2/LN1 Platform/Chassis VANEO (414) VARIO Box Body / Estate VARIO Bus VARIO Cab with engine VARIO Dumptruck VARIO Platform/Chassis V-CLASS (638/2) V-CLASS (W447) V-CLASS (W639) VITO / MIXTO Box (W639) VITO Box (638) VITO Box (W447) VITO Bus (638) VITO Bus (W639) VITO Dualiner (W447) VITO Tourer (W447)
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
Supabase
React Navigation
React Native Reanimated
BUILD KIT DIFFICULTY
Intermediate
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.
