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
Quartermaster
Quartermaster is the management app for tabletop miniature games that knows how to play nice.
$7.99 · In-app purchases
PRICE
$7.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
367 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.
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'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 Quartermaster: 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
Allow users to create custom templates and themes.
Assumption to check: Limited customization options for characters and inventory
Validate with people who use this workflow before building.
Hypothesis 2
Provide clear explanations and a trial for premium features.
Assumption to check: In-app purchase confusion for premium features
Validate with people who use this workflow before building.
Hypothesis 3
Implement advanced filtering and sorting options.
Assumption to check: Difficulty in managing large inventories
Validate with people who use this workflow before building.
Hypothesis 4
Introduce cloud backup and sync for accessibility across devices.
Assumption to check: No cloud sync for user data
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
Quartermaster is the management app for tabletop miniature games that knows how to play nice. As a wargamer, you're constantly thinking about new ways to assemble an army, force, or squadron for your favorite miniature games. Now you’ll be ready to draft your ideas whenever inspiration strikes. And when gaming time comes, you’ll have all your miniatures in order. No more loose pages and scribbled notes! Quartermaster uses game systems and faction templates created by a community of wargamers just like you. You can create and edit your own factions right in the app. The list of community-created games for Quartermaster continues to grow, and currently includes the following tabletop miniature games: - Warhammer: The Old World - Horus Heresy (all editions) - Necromunda - Warhammer Fantasy Battles - Warhammer 40,000 (2nd and 3rd Edition) - Trench Crusade - and more! Quartermaster is constantly evolving to bring you the latest technologies and the best user experience. - iCloud automatically syncs your drafts across your devices. - Share your drafts with your friends (and opponents!) by AirDrop, social media, email, or message. - Prepare a detailed list or card grid for printing. Play nice. Use Quartermaster.
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
React Native Gesture Handler
TypeScript
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.
