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
Bird — Ride Electric
Bird is the convenient, eco-friendly way to get around your city
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
1,498,745 ratings · Top 5%
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 included15 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 Bird — Ride Electric: map the core Travel 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
Implement transparent pricing and fee breakdown.
Assumption to check: High service fees during peak times
Validate with people who use this workflow before building.
Hypothesis 2
Expand service areas and provide real-time availability updates.
Assumption to check: Limited availability in certain areas
Validate with people who use this workflow before building.
Hypothesis 3
Introduce user reporting for maintenance and quality checks.
Assumption to check: Inconsistent scooter condition
Validate with people who use this workflow before building.
Hypothesis 4
Optimize performance for heavy user loads.
Assumption to check: App crashes during high traffic
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
Bird is the convenient, eco-friendly way to get around your city. Sign up to get access to electric vehicles in over 350 cities worldwide. HOW IT WORKS: * Download the app * Sign up * Choose your payment method (PayPal, credit card, etc.) * Select and unlock your vehicle * Ride electric! The fun way to get to your destination Head to work, run a few errands, or just go for a weekend ride. With the Bird app, get from point A to B safely and with style. ECO-FRIENDLY MOBILITY Our mission is to make cities more livable by reducing car usage and lowering carbon emissions. Every ride with Bird makes you a part of that mission. DISCOVER SPECIAL FEATURES AND OFFERS –Get free rides Share your code with a friend and you both get a free ride. —Travel together Riding with friends? The "group rides" feature lets you sign up for multiple e-vehicles through just one phone. —More rides for less money From daily to monthly rates, Bird has Ride Pass pricing plans that make sense for every rider. —Safety Do your part to keep your community running smoothly. Wear a helmet, use bike lanes, and make sure to park neatly and keep sidewalks clear. Download now and ride electric.
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
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BUILD KIT DIFFICULTY
Expert
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.
