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.
AI is the key to this app
$0.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Mahjong AI Analyze Calculator: map the core Entertainment workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Limited user feedback and guidance on game states
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent performance during analysis
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of customization options for advanced users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited analytics for user performance tracking
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
AI is the key to this app. This is the first App in the market that applies AI technology in mahjong. Mahjong is so popular in China, Japan and all over the world. Young people can learn mahjong skills from mahjong AI in this App. This App is so smart that it can scan mahjong tiles by the phone camera to know current tiles in seconds, and it can use its built-in mahjong AI to analyze which tile to discard makes a better strategy, what waiting tiles are if it's waiting after discard. People can learn from AI to improve his mahjong skills. This app builds a dedicated mahjong community for mahjong fans which is funny, this is also unique in the market. Mahjong AI - with this app, you can - 1. Learn the rules of Mahjong, understand the composition of various cards, such as Hualong, Combination Dragon, Qinglong, etc. 2. Enter mahjong hand tiles, it can automatically calculate the scores according to the Chinese standard rules or Japanese(Riichi) mahjong rules, and it can also assist in the calculation when playing mahjong. 3. It can use the camera to intelligently recognizes mahjong tiles. 4. Advanced Mahjong AI, which helps you analyze which tile has the highest winning rate in the current situation, and how many tiles you're waiting for. 5. Mahjong circle, the most fun mahjong community, where mahjong friends communicate here. Please look forward to more features in the future. [Automatic Subscription Instructions] 1. Service name: Unlimited access 2. Price: Free trial in the first week of the promotion period. The auto renew package is 1.49$ / quarter, (only 0.02$ daily on average). 3. The subscription service can be cancelled at any time in the App Store. 【Terms of Service and User Privacy Agreement】 https://mahjong.chat/privacy_policy.html
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.