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
MATCHA JOURNAL
Matcha Journal is your personal companion for exploring the world of matcha.
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 MATCHA JOURNAL: 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
Incorporate user-generated content and branding options.
Assumption to check: Limited brand variety may lead to repetitive entries.
Validate with people who use this workflow before building.
Hypothesis 2
Enable sharing of entries on social media.
Assumption to check: May lack social sharing features.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize entry templates.
Assumption to check: Not enough customization for journal entries.
Validate with people who use this workflow before building.
Hypothesis 4
Implement offline journaling capabilities.
Assumption to check: Potential lack of offline support.
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
Matcha Journal is your personal companion for exploring the world of matcha. Whether you're a curious beginner or a seasoned ceremonial grade enthusiast, Matcha Journal helps you document, rate, and reflect on every matcha you taste — turning fleeting impressions into a rich personal archive. Log Every Tasting Record the name, brand, origin, grade, aroma, colour, texture, and preparation method of any matcha you try. Add personal tasting notes and flavour tags like umami, grassy, sweet, or floral. AI Photo Scanning Simply take a photo of your matcha product and our AI instantly identifies the brand, grade, origin, and suggested flavour notes — saving you time and making journaling effortless. Rate & Discover Give each matcha a star rating and mark your favourites with "Would Buy Again." Filter and sort your journal to instantly surface your top-rated teas. Your Personal Dashboard Visualise your tasting history with beautiful charts. See your grade distribution, average ratings, most common flavour notes, and your highest-rated discoveries at a glance. Private & Personal Your journal is entirely your own. Entries are private to your account and never shared. Start your matcha journey today.
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
Supabase
TypeScript
React Navigation
Zustand
BUILD KIT DIFFICULTY
Starter
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.
