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
A Little to the Left: Drawers
Sort, stack, and organize household objects into particular arrangements in A Little to the Left: Cupboards & Drawers
$2.99 · In-app purchases
OVERALL US RANK
#88
Paid · all categories
REVENUE (Est)
$125K/mo
$68K - $182K
RATING
★ 4.9
1,557 ratings · Top 5%
Evidence scope: #88 is the current overall US Paid chart position. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 A Little to the Left: Drawers: map the core Games 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
Introduce new levels regularly or seasonal themes.
Assumption to check: Limited levels can lead to quick user disengagement.
Validate with people who use this workflow before building.
Hypothesis 2
Add varied puzzle types and timed challenges.
Assumption to check: Repetitive gameplay can become stale.
Validate with people who use this workflow before building.
Hypothesis 3
Implement adjustable difficulty settings.
Assumption to check: Difficulty scaling may frustrate players.
Validate with people who use this workflow before building.
Hypothesis 4
Offer an ad-free experience as a premium option.
Assumption to check: Ads can disrupt immersion.
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
Sort, stack, and organize household objects into particular arrangements in A Little to the Left: Cupboards & Drawers. Prepare to clean out the cabinets and secret compartments of the home with even more charming illustrations, surprising scenarios, and 25 delightful new Cupboards & Drawers themed puzzles to discover. - 25 new puzzles: a mixture of Cupboard & Drawers themed levels and traditional organization levels. - Four additional "Pet the Cat" interludes. - Puzzles nested within puzzles. - New functionality: Multiple steps to organizing within a single level. - Secret compartments! - Multiple drawers that are opened/closed within a level, requiring a player to move objects between them.
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
React Navigation
TypeScript
Firebase
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.
