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
Zipline - Drone Delivery
Zipline is a drone delivery app for ordering meals from restaurants, and groceries and essentials from Walmart and other retailers, delivered in minutes from the sky exactly where you want them, like your backyard.
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 5.0
10,016 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included
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 Zipline - Drone Delivery: map the core Food & Drink workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Zipline is a drone delivery app for ordering meals from restaurants, and groceries and essentials from Walmart and other retailers, delivered in minutes from the sky exactly where you want them, like your backyard. Who Zipline is for: Zipline is for anyone stocking up on everyday essentials or satisfying a craving who wants ultra convenient ordering, flexible delivery locations, real-time tracking, and a completely no-contact experience with no tipping. Enjoy FREE DELIVERY on your first order* and no tipping, ever. Key Features: - Food and groceries are delivered as fast as 15 minutes. - Restaurant meals that arrive fresh and high quality. - Ultra convenient ordering with flexible delivery locations, including your backyard. - A magical experience every time you use it. - Real-time tracking from launch to arrival. - Completely no-contact delivery every time. - No tipping. Great service is always included. Whether you are stocking up or satisfying a craving, Zipline brings thousands of items and restaurant favorites straight to you in minutes. Zipline partners with Walmart to bring you everyday essentials and grocery delivery, with everything you need delivered straight from the store to your door. Choose from top restaurants in select locations, like Chipotle, Buffalo Wild Wings, Wendy’s, Crumbl, Little Caesars, Blue Bell, and more, with fast delivery straight to you. *Free delivery promotion valid for restaurants only.
Written user reviews are not shown here. Check current App Store reviews >
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 delivery areas to include more regions.
Assumption to check: Limited delivery range
Validate with people who use this workflow before building.
Hypothesis 2
Implement a scheduling feature for users to select delivery times.
Assumption to check: High delivery times during peak hours
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to modify their order after checkout.
Assumption to check: No in-app order modification post-checkout
Validate with people who use this workflow before building.
Hypothesis 4
Partner with more restaurants to increase variety.
Assumption to check: Limited restaurant options
Validate with people who use this workflow before building.
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
React Navigation
Axios
Redux
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
