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
Fruit Day
Ever opened a bottle you love and found it… quiet? Maybe it was a Root Day.
$1.99
PRICE
$1.99
No 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 included
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 Fruit Day: 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
Ever opened a bottle you love and found it… quiet? Maybe it was a Root Day. BUY ONCE. NEVER PAY AGAIN. One purchase covers every year, forever. Fruit Day calculates the calendar from the Moon's position right on your iPhone and Apple Watch, so there's no yearly calendar to buy, no subscription, no ads and nothing to renew. Biodynamic winemakers have long followed the Moon. As it moves through the constellations, every day falls into one of four types. Many sommeliers, retailers and critics schedule tastings around them. Fruit Day follows Maria Thun's calendar to the hour, telling you which day you're in right now and exactly when it changes. THE GOOD DAYS FRUIT DAY: the best. Wine is at its most expressive. Open the bottle you've been saving. FLOWER DAY: also good. Aromatic whites and delicate wines shine. THE OFF DAYS LEAF DAY: not great. Wines can seem muted or green. Fine for a Tuesday bottle. ROOT DAY: the worst. Wines can taste closed, flat or earthy. Save the special bottle. ONE LOOK, YOU KNOW Cherries for Fruit, flowers for Flower, leaves for Leaf, carrots for Root. The Today screen fills with the day's emoji, so you know where you stand at a glance. (Prefer your own? Pick any emoji in Settings.) ON YOUR WRIST Standing in a wine shop, or about to pull a cork at dinner? Glance at your watch. • Complications for your watch face: the day's name in a round badge, along the corner of the screen, or as a single line like "Fruit · 5 PM" right under the time • Smart Stack: scroll the Digital Crown to see today's day type, when it ends and what comes next • A standalone Apple Watch app that works even when your iPhone is in the other room BUILT FOR WINE PEOPLE • Today: a lively, animated view of the current day and the hour it ends • Calendar: every change, to the hour, in your own time zone. Plan a dinner, a tasting or an opening weeks ahead • Learn: Maria Thun's method, what each day means in the glass, and notable biodynamic estates • Widgets: today's day type on your Home Screen • Siri: "Is it a fruit day in Fruit Day?" PRIVATE No account and no tracking. Fruit Day collects nothing.
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 the selection of fruits and include exotic options.
Assumption to check: Limited variety of fruits compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a real-time tracking feature for deliveries.
Assumption to check: No real-time order tracking
Validate with people who use this workflow before building.
Hypothesis 3
Introduce promotional offers or discounts for bulk orders.
Assumption to check: Single price point with no discounts
Validate with people who use this workflow before building.
Hypothesis 4
Add a section for user reviews and ratings for each fruit.
Assumption to check: Lack of user reviews for fruits
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
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.
