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
Hello Kitty Dream Village
Sanrio’s official license! Start a new life in Smile Town with Sanrio characters!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
6,382 ratings · Top 30%
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 Hello Kitty Dream Village: map the core Social Networking 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 diverse and themed items for users to choose from.
Assumption to check: Limited customization options for village aesthetics
Validate with people who use this workflow before building.
Hypothesis 2
Implement customizable notification settings for users.
Assumption to check: Notification spam from friends' actions
Validate with people who use this workflow before building.
Hypothesis 3
Provide clear value for purchases and improve free content.
Assumption to check: In-app purchases can feel predatory
Validate with people who use this workflow before building.
Hypothesis 4
Create more engaging activities and events to foster deeper connections.
Assumption to check: Social interactions can be superficial
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
Sanrio’s official license! Start a new life in Smile Town with Sanrio characters! ＊Style your clothes and room! Have a cozy conversation with your favorite character＊ [The Main Characters] Hello Kitty, My Melody, Little Twin Stars, Pompompurin, and Cinnamoroll - all together in one place! Pochacco, Kuromi, Gudetama, Tuxedosam, Aggretsuko, Keroppi, and others are featured too. Items with your favorite characters can be found in-game! ＊ … * … ＊ … * …＊ … * … ＊ So, what are you waiting for? Join Hello Kitty Dream Village! ＊ … * … ＊ … * …＊ … * … ＊ 1. Dress your avatar with cute clothes and accessories. - We have great outfits for every style, including cute designs with different Sanrio character themes! 2. Decorate your lovely room - As you explore, beloved Sanrio characters will delight you by popping up here and there as plushies! 3. Hold a party in your room and invite your friends! - Once your party gets going, there’s a good chance Sanrio characters will stop by! 4. Have conversations with characters living in Smile Town! - Sanrio characters might ask you for help! Grow close to your favorite characters by chatting with them! 5. Play alongside neighbors who also love Sanrio characters! - Share your interests with your neighbors by visiting their room or posting on the chatboard! ＊ … * … ＊ … * …＊ … * …＊ The following types of residents are already having a great time in town; ＊ … * … ＊ … * …＊ … * …＊ · Those who love Sanrio characters · Those who want to engage their favorite characters in conversation! · Those who'd like to relax in a warm and inviting environment! · Those who love fashion and want to try all kinds of different styles! · Those who want to explore their love for interior design by making the perfect room! · Those who enjoy Sanrio Puroland/Harmony Land! · Those who like Sanrio products! · Those searching for an avatar app they can enjoy with their spare change! · Those who love cute things! · Those who enjoy going to parties!
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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.
