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
holedown
dig deep underground by shooting balls and breaking blocks, traversing your way to the planet cores
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
395 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 holedown: 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 varied levels and power-ups to keep gameplay fresh.
Assumption to check: Some users find the game repetitive over time.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a gradual difficulty increase with player feedback.
Assumption to check: Difficulty spikes can be frustrating.
Validate with people who use this workflow before building.
Hypothesis 3
Offer a smoother ad experience or more attractive in-app purchases.
Assumption to check: Ads can disrupt gameplay.
Validate with people who use this workflow before building.
Hypothesis 4
Enhance social aspects, like inviting friends and sharing scores.
Assumption to check: Limited social features.
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
dig deep underground by shooting balls and breaking blocks, traversing your way to the planet cores. with limited shots per round and some blocks fixed firmly to the wall, thoughtfully strategize and aim for maximum impact. knock down as many blocks as possible while collecting crystals for upgrades and getting deeper beneath the surface. choose your ideal upgrades such as more starting balls, more shots per round, or storing more crystals, based on your play style and overall strategy. work your way into the procedurally generated planets with a delightful spectacle of bouncing as you get closer to the planet’s core. balance your plan between ball bouncing patterns and unpredictable, surprising bounces in this mesmerizing and curious game oozing with charm. immerse yourself in a world of extravagant minimalistic art while jamming out to an original space acid soundtrack as you feel the satisfaction of digging further underground. features: • six planets to dig through • original soundtrack of seven diverse and space-acid themed tunes • a tight experience with 5+ hours of gameplay’ • intuitive, one-handed play • endless play mode • 5 achievements • 11 leaderboards • split view support • toggle for screen shake
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
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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.
