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
Heap: Composting Companion
Heap is a calm, honest composting companion
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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.
JavaScript is required to complete mailbox verification.
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 Heap: Composting Companion: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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 a visual progress tracker with detailed metrics.
Assumption to check: Users find it difficult to track composting progress
Validate with people who use this workflow before building.
Hypothesis 2
Add discussion forums and user interaction tools.
Assumption to check: Limited community engagement features
Validate with people who use this workflow before building.
Hypothesis 3
Provide personalized tips based on user composting history.
Assumption to check: Insufficient tips for optimizing composting
Validate with people who use this workflow before building.
Hypothesis 4
Clarify subscription tiers and benefits in the app.
Assumption to check: Subscription model can be confusing
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
Heap is a calm, honest composting companion. No ads. No subscriptions. No tracking. Just the answers you actually need when you're standing over a bin wondering what went wrong. WHAT'S INSIDE - Can I Compost This? Search 236 materials across 8 categories and get a clear answer, plus the reason behind it. - C:N Ratio Calculator. A live gauge and material picker help you balance browns and greens without a chemistry degree. - Troubleshooter. A 22-node decision tree that actually asks the right questions when your pile stinks, stalls, or sours. - Bin Tracker. Log temperature over time and watch your pile heat up, hold, and finish. - Five Method Guides. Hot, cold, vermicompost, bokashi, and tumbler. Pick the one that fits your space and pace. WHY HEAP Most composting apps are either ad-stuffed junk or buried inside a $20-a-year gardening bundle. Heap does one thing well and charges one fair price once. Built by gardeners, not growth hackers. Every material explanation, every troubleshooting branch, every method guide was written by a human who has stuck their hands into a cold, smelly pile and figured out why. OFFLINE AND PRIVATE Heap works without a connection. Your bin logs stay on your device. We don't run ad trackers, pixels, or third-party analytics. Your compost is your business. PART OF THE PLANT ANYWHERE FAMILY Heap is one of a small constellation of focused gardening tools from Plant Anywhere. Each app does one thing. None of them nag you to upgrade. PRICE $1.99, one time. No subscription. No in-app purchases. No premium tier later. Buy it once, keep it.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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 Navigation
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.
