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
GrassMaster
GrassMaster contains proven maintenance methods used by the Pros to have your lawn looking beautiful!
$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.
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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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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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 GrassMaster: map the core Lifestyle 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 visual indicators and reminders for grass care.
Assumption to check: Users often find it hard to track grass health effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Provide personalized tips based on grass type and location.
Assumption to check: Limited tips and advice for grass care.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the paywall with clear value propositions.
Assumption to check: Subscription models can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Add a community forum for users to discuss grass care.
Assumption to check: Lack of community features for users to share experiences.
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
GrassMaster contains proven maintenance methods used by the Pros to have your lawn looking beautiful! New version has a Sod Estimate Calculator and a Mulching Materials Estimate Calculator. Need to sod or mulch an area of your landscape? GrassMaster now makes it super-easy to estimate the materials and cost for sod or mulch! How and when to fertilize, water, treat weeds and common lawn diseases. GrassMaster includes reference images so you can quickly identify a particular disease so you know exactly what herbicides to buy. No more guess-work! The turf grass specifications in GrassMaster are not only our years of experience, but also right in line with turf maintenance practices recommended by Extension Offices and Universities all across the U.S. as well as many Landscaping Professionals. GrassMaster also includes an easy to follow Fertilizing Schedule for each Lawn type (listed below). The Schedule file can be Emailed right from this App and then imported into your favorite Calendar application (iCal, Outlook, etc.). If you're syncing your Calendar to iTunes, you can have the Schedule imported into your iPhone Calendar App. GrassMaster covers the most common Lawn/Turf grasses, including: Bahiagrass Bermuda Grass Bluegrass Centipede Grass Fescue Grass Ryegrass St. Augustine Grass Zoysia Grass We hope you enjoy using GrassMaster! For full details and more screenshots, questions or comments, please visit our Support site at: grassmaster.i2dllc.com
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
TypeScript
Zustand
React Navigation
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.
