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
Stardew Save Editor
Enhance your Stardew Valley experience with my Stardew Save Editor.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.9
156 ratings · Top 50%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Stardew Save Editor: map the core Utilities 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
Provide more comprehensive editing features and customization.
Assumption to check: Limited editing options for advanced users
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the UI by grouping settings and options.
Assumption to check: Cluttered interface with too many options
Validate with people who use this workflow before building.
Hypothesis 3
Add a feature for backing up and restoring saves.
Assumption to check: No backup or restore functionality
Validate with people who use this workflow before building.
Hypothesis 4
Implement a guided onboarding process to improve usability.
Assumption to check: Confusing navigation for first-time users
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
Enhance your Stardew Valley experience with my Stardew Save Editor. Now supporting Stardew Valley v1.5 and saves from PC, Mac and Nintendo Switch! Features: - Add money - Manage inventory and chest items - Instantly receive missing Community Center items - Send yourself a random daily gift (after Community Center is complete) - Instantly finish all crops, construction, incubators and craftable items - Purchase artifacts, decorations, fish, food, hats, minerals, tools, weapons and out of season seeds - Automatically remove weeds and other debris - Switch between farm types, cave types and professions - Adjust friendship, tool, luck, combat and skill levels - Add or remove pets (have both cats and dogs, or neither!) - Add custom quests and NPC responses - Change your player or farm name - Choose your own weather - Time travel between days, seasons & more You can also edit your farm in the middle of the day! Press "Save Backup" in Stardew Valley to edit the game in progress. This will allow you change time and "Teleport" to anywhere in game: - Visit villager houses and stores, even when they're closed - Access areas like the Greenhouse and Sewer before you unlock them - Shop at JojaMart after they leave town (if you must) - Gain access to 3 more wine cellars - Visit the unfinished Summit (you will need to teleport back) - Jump to any level of the Skull Cavern I originally built this as a tool for myself after having to restart the game, but figured others might enjoy it too. Please email me if you find any issues. Enjoy!
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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
expo-file-system
@react-native-picker/picker
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.
