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
轻历 - 清新日历
轻历是一款纯净无广告的高颜值日历。您可以使用“轻历”来创建和管理你的日程、计划和生日。也可以快速了解关于时间和日历的所有信息。更有自定义角标、个性化设置主题色等功能，让您自由装饰属于自己的日历。iCloud还会自动同步您的日程和自定义标签。让您记录下的信息永远不会丢失。
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.3
11 ratings · Top 30%
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 included18 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 轻历 - 清新日历: 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
Allow users to customize event colors and add custom notifications.
Assumption to check: Limited customization options for events.
Validate with people who use this workflow before building.
Hypothesis 2
Implement recurring tasks to streamline event management.
Assumption to check: No recurring event feature.
Validate with people who use this workflow before building.
Hypothesis 3
Enable sync with Google Calendar and Apple Calendar.
Assumption to check: Lack of integration with other calendar apps.
Validate with people who use this workflow before building.
Hypothesis 4
Develop home screen widgets for quick event viewing.
Assumption to check: Absence of a widget for quick 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
轻历是一款纯净无广告的高颜值日历。您可以使用“轻历”来创建和管理你的日程、计划和生日。也可以快速了解关于时间和日历的所有信息。更有自定义角标、个性化设置主题色等功能，让您自由装饰属于自己的日历。iCloud还会自动同步您的日程和自定义标签。让您记录下的信息永远不会丢失。 功能 · 包含最全的农历、黄历、节日、节气、法定节假日等。时间信息、每日宜忌等一目了然。更全面的黄历信息一触即达 · 点击首页的 “+”来创建一个计划、日程、生日或倒数日。还可设置提醒时间，让重要的事永远不会错过 · 轻历还可以同步系统日历。 首页右滑可以进入更多功能页面。 · 日期计算小工具 - 帮你快速得到想要的信息。 · 自定义角标功能 - 可以让您给任意日期加上标签，您可以用来标注自己的假期和工作日，也可以用来标注任何重要的日子。 · 个性化设置 - 定制日历的主题色，字体。让它更符合自己的审美 · 联系我 告诉我你遇到的问题、你的建议、你想要的功能 邮箱：[email protected] 微博：轻历
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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
React Navigation
Day.js
React Native Paper
@react-native-async-storage/async-storage
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.
