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
DelayBuy: Think Before You Buy
**DelayBuy - Your Personal Spending Control 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.
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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 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.
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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 DelayBuy: Think Before You Buy: map the core Productivity 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
Incorporate reminders or push notifications to prompt users to revisit their decisions.
Assumption to check: Users may forget to review their decisions and miss the opportunity to reflect.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to create custom categories or tags for their decisions.
Assumption to check: Limited customization options for decision categories.
Validate with people who use this workflow before building.
Hypothesis 3
Add a sharing feature to let users share decisions with friends or within groups.
Assumption to check: No social sharing features to discuss decisions with friends.
Validate with people who use this workflow before building.
Hypothesis 4
Provide insights on past decisions to help users evaluate their purchasing behavior.
Assumption to check: Lack of analytics on decision outcomes.
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
**DelayBuy - Your Personal Spending Control Companion** Tired of impulse purchases? DelayBuy transforms your shopping habits through smart delayed decision-making. Never regret a purchase again! **WHAT MAKES DELAYBUY SPECIAL** DelayBuy goes beyond simple shopping lists by creating a mindful waiting period that helps you distinguish between wants and needs. Build lasting financial discipline while saving money effortlessly. **KEY FEATURES** - **Smart Delay System** - Add products and set flexible waiting periods - **Decision Support** - Record reasons and reflections for each purchase - **Progress Tracking** - Visualize money saved and decisions analyzed - **Budget Awareness** - Set mental budgets and compare with actual prices - **Multi-Device Sync** - Access your delayed items across all devices - **9 Languages Support** - Fully localized in English, Chinese, Japanese, Korean, Spanish, French, German, and Portuguese - **Theme Options** - Choose between light and dark mode **PERFECT FOR** - Young adults wanting to control spending habits - People who frequently make impulse purchases - Anyone building financial discipline - Mindful consumers seeking intentional shopping - Budget-conscious individuals saving for goals **HOW IT WORKS** 1. **Add & Wait** - When you want to buy something, add it to DelayBuy instead 2. **Set Period** - Choose a waiting period from 3 days to 1 month 3. **Reflect** - Use the cooling-off period to reconsider your need 4. **Decide Smart** - When time's up, make a mindful purchase or skip decision **WHY CHOOSE DELAYBUY** Unlike other finance apps, DelayBuy addresses the root cause of overspending - impulse decisions. By creating space between desire and purchase, it helps build lasting financial habits that save money and reduce clutter. **PRIVACY FIRST** Your shopping data stays private with local-first storage and optional encrypted cloud backup. We never share your personal information. --- **Download DelayBuy now and start your journey toward financial mindfulness!** --- This version maintains all the engaging elements while focusing purely on the app's functionality and user benefits, without any mention of pricing or subscription strategies. Terms of use (EULA): https://shijingty.com/delaybuy/terms?lang=en
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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 Date Picker
React Native Reanimated
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.
