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
Assistant for Stardew Valley
Unofficial Assistant for Stardew Valley helps you optimize your farming experience
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
305 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 included17 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 Assistant for Stardew Valley: map the core Reference 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
Implement offline caching for guides and items.
Assumption to check: Limited offline functionality, making it hard to access guides without internet.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and enhance search features.
Assumption to check: Navigation can be confusing with multiple sections.
Validate with people who use this workflow before building.
Hypothesis 3
Add community features for users to share tips and experiences.
Assumption to check: Lack of user interaction features, like comments or community sharing.
Validate with people who use this workflow before building.
Hypothesis 4
Implement user profiles to tailor content and recommendations.
Assumption to check: No personalized content based on user preferences.
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
Unofficial Assistant for Stardew Valley helps you optimize your farming experience. With this guide, you can: • Browse the game encyclopedia: View information about crops, fish, items, and characters. Our app's built-in Stardew Valley wiki has all the information you need in one convenient place. • Track NPC schedules: Plan your interactions with NPCs and view their availability on specific days. • Manage tasks: Set repeat patterns for tasks and track their completion to help you stay on top of your farm work. • View NPC gift preferences: Make gift-giving easier and build stronger relationships with NPCs by viewing their favorite and disliked items. • Monitor in-game events: Keep track of festivals, birthdays, and other important in-game events. • Track Community Center bundles: Keep track of the items needed to complete each bundle. The app is an independent tool developed to enhance players' experience. It is not affiliated with ConcernedApe. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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-query
react-native-paper
expo-asset
BUILD KIT DIFFICULTY
Starter
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.
