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
Ian's Laces - How to tie and lace shoes
HOW DO YOU LACE YOUR SHOES?
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
12 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.
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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 Ian's Laces - How to tie and lace shoes: 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
Add user-generated content and feedback system.
Assumption to check: Limited tutorial variety
Validate with people who use this workflow before building.
Hypothesis 2
Implement onboarding tutorials to guide users.
Assumption to check: Difficult navigation for new users
Validate with people who use this workflow before building.
Hypothesis 3
Enable sharing tutorials directly to social media.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to save tutorials for offline viewing.
Assumption to check: Absence of offline access
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
HOW DO YOU LACE YOUR SHOES? Do you just use an "ordinary" lacing method? You may be surprised at what's possible! You have found, without a doubt, the most awesome collection of shoe lacing methods. Cool, trendy methods. Useful, practical methods. Unusual, special purpose methods. "Ian's Laces" includes 52 different lacing methods, many with several variations, for a total of 112 possibilities. Compiled by Ian "Professor Shoelace" Fieggen, creator of the web's number one site about shoelaces, this app brings together more than a decade of lacing research. Plus, you'll also get exclusive methods not available on Ian's web site (or anywhere else). Each method includes one or more clear, color-coded diagrams plus detailed, step-by-step instructions and helpful tips. Everything is included - NO Internet access is required. What's more, you can design your own patterns! Just as quickly as you can drag your finger, our virtual laces snap to the eyelets of a virtual shoe. It's all about your creativity, so you can export or email your best "lace art" with ease. With "Ian's Laces", your footwear will never be "ordinary" again. And if someone does ask: "How did you do that?", the answer is at your fingertips, not your feet.
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 Navigation
Axios
Expo Video
React Native Async Storage
Zustand
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.
