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
Rusty Lake Hotel
Welcome our guests to the Rusty Lake Hotel and make sure they will have a pleasant stay
$1.99
PRICE
$1.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
1,554 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 included15 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 Rusty Lake Hotel: 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
Enhance user engagement with more interactive elements.
Assumption to check: Limited interactivity in game scenes
Validate with people who use this workflow before building.
Hypothesis 2
Include hints or guided puzzles to assist players.
Assumption to check: Puzzles may be too challenging for some players
Validate with people who use this workflow before building.
Hypothesis 3
Introduce branching storylines or multiple endings to increase replay value.
Assumption to check: Linear gameplay progression
Validate with people who use this workflow before building.
Hypothesis 4
Add multiplayer elements or social sharing options to enhance community interaction.
Assumption to check: Lack of 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
Welcome our guests to the Rusty Lake Hotel and make sure they will have a pleasant stay. There will be 5 dinners this week. Make sure every dinner is worth dying for. Rusty Lake Hotel is a mysterious point-and-click adventure by the creators of the Rusty Lake & Cube Escape series. Features: - Pick-up-and-play: easy to start, but it will be hard to put down - Tons of puzzles: a total of 6 rooms full of unique and various brain teasers - Thrilling and engaging story: there will be 5 dinners with intriguing guests and staff - Full of suspense and atmosphere: Rusty Lake Hotel is a surreal place, where anything can happen… - Impressive soundtrack: every room has its own designed theme song - Achievements: an all-time gallery you've never seen before We will unfold the mysteries of Rusty Lake one step at a time, follow us @rustylakecom.
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
react-navigation
@react-native-async-storage/async-storage
react-native-reanimated
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.
