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
My Christmas Tree - Countdown
With the My Christmas Tree app, you can customize your personal and animated Christmas tree
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
8 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 included16 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for My Christmas Tree - Countdown: map the core Entertainment 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
Offer more customizable themes and user uploads.
Assumption to check: Limited theme options for personalization
Validate with people who use this workflow before building.
Hypothesis 2
Enable sharing countdowns via social media.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Add reminder notifications for countdown milestones.
Assumption to check: No notifications for important dates
Validate with people who use this workflow before building.
Hypothesis 4
Implement in-app purchases for additional features or themes.
Assumption to check: Single purchase model
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
With the My Christmas Tree app, you can customize your personal and animated Christmas tree. And add the Christmas decorations you want to see, such as Christmas cards, balls, bows, stockings, and Christmas lights. You can also add a Christmas Tree widget to your home screen and notification panel. That is very handy to see the countdown on how many days it is until Christmas Eve or the entire day before Christmas Day. That is built for iPhone, iPhone Pro, iPad, iPad Air, iPad Mini, and iPad Pro. It is the ideal entertainment tool to enjoy the Christmas season at home and anywhere in the world. Merry Christmas! When it is just the 12 days of Christmas, or you are more than 60 days early. You will be notified of how many days are left. In the small widget, you will see it on the top right of your widget. And for the medium widget, on the right of your Christmas tree, you see the countdown to when it is Christmas. What is Christmas? Christmas was traditionally a Christian festival celebrating the birth of Jesus, but in the early 20th century, it also became a secular family holiday, observed by Christians and non-Christians alike. The secular holiday is often devoid of Christian elements, with the mythical figure Santa Claus playing the pivotal role. That lives in the winter wonderland at the North Pole. Why is Christmas celebrated? Christmas is an annual festival commemorating the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration among billions of people around the world. The unique features of this high-quality app: ◆ Change the tree type in the app and widget ◆ Change the tree blinking light color ◆ Change the color of the bows ◆ Change the color of the stockings ◆ Option to change the widget background to solid, gradient, image, or transparent ◆ Option to show you the days left until Christmas Day (with the option to count to 24 or 25 December) Your Christmas Countdown is ready to go. Now we must wait and sing this song. Jingle bells, jingle bells, jingle all the way...
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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
React Native
Expo
react-navigation
@react-native-async-storage/async-storage
react-native-reanimated
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.
