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 Opel
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
N/A
No ratings yet
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 included18 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 Opel: 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
Focus on a clean, minimalist design with clear CTAs.
Assumption to check: Poor user experience due to cluttered design
Validate with people who use this workflow before building.
Hypothesis 2
Implement advanced filtering and sorting options for product searches.
Assumption to check: Limited search functionality with no filters
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate product reviews and ratings to enhance user trust.
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 4
Add order tracking with notifications for user updates.
Assumption to check: No order tracking
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: ADAM AGILA (A) (H00) AGILA (B) (H08) AMPERA ANTARA ARENA Box (TB, TF) ARENA Combi (THB) ASCONA B (81_, 86_, 87_, 88_) ASCONA C (81_, 86_, 87_, 88_) ASCONA C Hatchback (84_, 89_) ASTRA A+ Sedan (L69) ASTRA F (56_, 57_) ASTRA F CLASSIC Estate ASTRA F CLASSIC Hatchback ASTRA F CLASSIC Sedan ASTRA F Convertible (53_B) ASTRA F Estate (51_, 52_) ASTRA F Hatchback (53_, 54_, 58_, 59_) ASTRA F Van (55_) ASTRA G Convertible (F67) ASTRA G Coupe (F07_) ASTRA G Delvan (F70) ASTRA G Estate (F35_) ASTRA G Hatchback (F48_, F08_) ASTRA G Sedan (F69_) ASTRA GTC J ASTRA H (L48) ASTRA H Estate (L35) ASTRA H Sport Hatch (L08) ASTRA H TwinTop (L67) ASTRA H Van (L70) ASTRA J ASTRA J Sedan ASTRA J Sports Tourer ASTRA K CALIBRA A (85_) CAMPO (TF_) CASCADA (W13) COMBO (71_) COMBO Box Body / Estate COMBO Box Body / Estate (X12) COMBO Platform/Chassis COMBO Tour COMBO Tour (X12) CORSA A Box CORSA A Hatchback (93_, 94_, 98_, 99_) CORSA A TR (91_, 92_, 96_, 97_) CORSA B (73_, 78_, 79_) CORSA B Box (73_) CORSA C (F08, F68) CORSA C Box (F08, W5L) CORSA D CORSA D Van CORSA E CORSA E Van CORSA SWING STATION WAGON (F35) CORSA Utility Pickup CORSA Utility Pickup FRONTERA A (5_MWL4) FRONTERA A Sport (5_SUD2) FRONTERA B (6B_) GT Convertible INSIGNIA INSIGNIA Estate INSIGNIA Sedan KADETT D (31_-34_, 41_-44_) KADETT D Estate (35_, 36_, 45_, 46_) KADETT E (39_, 49_) KADETT E Box (37_, 47_) KADETT E Combo (38_, 48_) KADETT E Convertible (43B_) KADETT E Estate (35_, 36_, 45_, 46_) KADETT E Hatchback (33_, 34_, 43_, 44_) KARL MANTA B (58_, 59_) MANTA B CC (53_, 55_) MERIVA MERIVA B MOKKA MONTEREY A (UBS_) MONTEREY B MONZA A (22_) MOVANO B Box MOVANO B Bus MOVANO B Platform/Chassis MOVANO Box (F9) MOVANO Combi (J9) MOVANO Dumptruck (H9) MOVANO Platform/Chassis (U9, E9) OMEGA A (16_, 17_, 19_) OMEGA A Estate (66_, 67_) OMEGA B (25_, 26_, 27_) OMEGA B Estate (21_, 22_, 23_) REKORD E (17_-19_, 11_, 14_, 16_) REKORD E Estate (61_, 66_, 67_) SENATOR A (29_) SENATOR B (29_) SIGNUM SINTRA SPEEDSTER TIGRA (95_) TIGRA TwinTop VECTRA A (86_, 87_) VECTRA A Hatchback (88_, 89_) VECTRA B (36_) VECTRA B Estate (31_) VECTRA B Hatchback (38_) VECTRA C VECTRA C Estate VECTRA C GTS VIVARO Box VIVARO Box (F7) VIVARO Combi VIVARO Combi (J7) VIVARO Platform/Chassis VIVARO Platform/Chassis (E7) ZAFIRA A (F75_) ZAFIRA B (A05) ZAFIRA B Van ZAFIRA TOURER C (P12)
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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
Supabase
Redux
Axios
React Navigation
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.
