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
Kafi
Kafi - The world of coffee lovers
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
555 ratings · Top 15%
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 Kafi: 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
Expand restaurant partnerships to include more local favorites.
Assumption to check: Limited restaurant options in some areas
Validate with people who use this workflow before building.
Hypothesis 2
Implement real-time driver tracking to manage user expectations.
Assumption to check: Long delivery times during peak hours
Validate with people who use this workflow before building.
Hypothesis 3
Add a more robust search and filter functionality.
Assumption to check: Difficulty in finding specific dishes
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a loyalty rewards program to incentivize frequent orders.
Assumption to check: Lack of promotional rewards for repeat customers
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
Kafi - The world of coffee lovers Welcome to the world of coffee lovers! Kafi app offers a variety of coffee recipes to stimulate your taste buds and give your a refreshed feel. Get yourself ready to make some hot coffee to start your morning with a fresh mind. Product Highlights: - Coffee Recipes：Step-by-step and enlarged instructions that make it easy to follow the recipes. - Video Courses: Videos of every step of the process will help you to make the most perfect coffee. - Coffee Stories: Share your coffee stories and brewing methods, see what community members are drinking, and discuss how we enjoy our coffee differently. - Worldwide Coffee Culture: Learn more about coffee culture of different countries and regions, including their history, where they come from, and what influences they have been exposed to. - Collection: Add your favourite recipes to your own collection and check it anytime you want. Download Kafi now and start making your delicious coffee at home. Privacy Policy: https://enjoy.kafi-life.com/apple/privacy-policy/kafi Terms of Service: https://enjoy.kafi-life.com/apple/terms-conditions/kafi
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/supabase-js
react-navigation
expo-location
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.
