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
Starbucks
Ordering ahead is just a download away
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
8,304,675 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 included17 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 Starbucks: 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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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
Optimize image loading and caching.
Assumption to check: Slow loading times during peak hours
Validate with people who use this workflow before building.
Hypothesis 2
Include more customization features for items.
Assumption to check: Limited customization options for orders
Validate with people who use this workflow before building.
Hypothesis 3
Simplify and clarify rewards earning and redemption process.
Assumption to check: Confusing rewards system
Validate with people who use this workflow before building.
Hypothesis 4
Implement performance monitoring and continuous improvements.
Assumption to check: Inconsistent app performance
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
Ordering ahead is just a download away. Get the Starbucks® app for an easier way to enjoy your favorites and discover Rewards in every sip as a member. ORDER SEAMLESSLY • Order in the app when you’re on your way • Customize and create your perfect drink • Save your favorite stores • View past orders & save custom drinks • Save payment methods and scan to pay in stores • Tip your barista for your delicious drink JOIN STARBUCKS® REWARDS • Earn Stars to use on free food & drinks • Start at Green status & level up to Gold or Reserve for exclusive benefits • Enjoy a free drink on your birthday*, plus more time to redeem as you level up • Try one free customization a month on Free Mod Mondays** • Enjoy early access to new items • Get Bonus Stars for digitally reloading your Starbucks Card (minimum $30) • Explore games and offers just for you SEND & SAVE eGIFTS • Save all your Starbucks Cards in one spot • Send eGifts via email, text, or messaging app • Choose from unique designs for every occasion FIND A STORE • See stores near you • Get directions and hours • View store amenities like drive-thru & Wi-Fi Must be a Starbucks Rewards member to enjoy exclusive member benefits and app features. *Birthday Reward: Green members: Redeemable on member’s birthday only, at participating stores. Gold members: Redeemable for 7 days starting on member’s birthday, at participating stores. Reserve members: Redeemable for 30 days starting on member’s birthday, at participating stores. Free birthday drink must be standard menu size. Excludes alcohol and multi-serve items. To qualify, you must have made at least one Star-earning transaction prior to your birthday each year. **Mod Monday: Redeemable at participating stores. Members will receive one free customization each month, up to $2 (pre-tax) each. Not valid for use with Rewards or other offers, discounts or promotions.
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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
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BUILD KIT DIFFICULTY
Advanced
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.
