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
Whodunit?™: Detective Archives
Get instant access to the entirety of the Whodunit™ archives
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.7
292 ratings · Top 15%
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/
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 Whodunit?™: Detective Archives: map the core Entertainment 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 user-generated cases or seasonal events to keep content fresh.
Assumption to check: Limited case variety can lead to repetitive gameplay
Validate with people who use this workflow before building.
Hypothesis 2
Offer a freemium model with more accessible content to attract a larger audience.
Assumption to check: In-app purchases may deter casual players
Validate with people who use this workflow before building.
Hypothesis 3
Implement faster-paced cases or time-limited challenges to engage users better.
Assumption to check: Some users may find the narrative pacing too slow
Validate with people who use this workflow before building.
Hypothesis 4
Focus on thorough QA and user feedback to improve stability.
Assumption to check: Occasional bugs during character interactions
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
Get instant access to the entirety of the Whodunit™ archives. Step into the role of a master detective and immerse yourself in a variety of gripping and original murder mystery whodunits. Examine the evidence, interrogate suspects, and piece together the clues to solve each case. Test your skills and see if you have what it takes to catch a murderer! INVESTIGATE AND UNCOVER THE TRUTH! Immerse yourself in compelling crime stories filled with unexpected twists. It’s your job to find the murderer and bring justice to the victims. Each murder mystery presents a unique challenge, with intricate and engaging plots that will keep you on the edge of your seat. Will you arrest the right person, or will the killer walk free? BECOME A MASTER DETECTIVE! Whodunit? brings the excitement of solving murder mysteries and true crime investigations to your mobile device. Will you rely on evidence, or will your instincts as a detective guide you? The outcome of each crime depends on your detective skills. SOLVE YOUR WAY TO THE TOP! Gather clues, interrogate suspects, and piece together evidence to solve complex murder mysteries. Each crime is a unique puzzle that will test your detective abilities. Earn XP for correctly solving each murder mystery, with bonus XP available for solving the crime quickly. Show the world you’re the top detective! Privacy Policy: https://mvpgames.co/privacypolicy/ Terms of Service: https://mvpgames.co/tou/
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
Supabase
Zustand
react-native-reanimated
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.
