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
The Room: Old Sins
Enter The Room: Old Sins and be transported to a place where tactile exploration meets challenging puzzles and a captivating story
$0.99
PRICE
$0.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
35,286 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 included
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.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Enter The Room: Old Sins and be transported to a place where tactile exploration meets challenging puzzles and a captivating story. The sudden disappearance of an ambitious engineer and his high-society wife provokes the hunt for a precious artefact. The trail leads to the attic of their home, and the discovery of an old, peculiar dollhouse… Explore unsettling locations, follow obscure clues and manipulate bizarre contraptions as you uncover the mysteries within Waldegrave Manor. THE ULTIMATE PUZZLE BOX Explore a deviously complex dollhouse which transforms at your fingertips. Each intricate room is a portal to a new, stunning environment. PICK-UP-AND-PLAY DESIGN Easy to begin yet hard to put down, enjoy a unique mix of intriguing puzzles with a simple user interface. INTUITIVE TOUCH CONTROLS A tactile experience so natural you can almost feel the surface of each object. INTRICATE OBJECTS Examine dozens of detailed objects to discover which of them conceal hidden mechanisms. ATMOSPHERIC AUDIO A haunting soundtrack coupled with dynamic sound effects create an unforgettable soundscape. iCLOUD & GAMECENTER SUPPORTED Share your progress between multiple devices and unlock achievements. MULTI LANGUAGE SUPPORT Available in English, French, Italian, German, Spanish, Brazilian Portuguese, Turkish and Russian. Fireproof Games is an independent studio from Guildford, United Kingdom. Find out more at fireproofgames.com Follow us @Fireproof_Games Find us on Facebook
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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.
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
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
