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.
▸ Featured in The New York Times!
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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 Mathmateer®: map the core Education 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 challenge variety may lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: In-app purchases may frustrate users when they hit paywalls.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Progress tracking lacks visual appeal.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User interface can feel cluttered.
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.
▸ Featured in The New York Times! ▸ Editor's Choice Award! - Children's Technology Review Math can be fun! Build your very own rockets and fly them to the stars with Mathmateer®! While your rocket is floating weightlessly in space, the real fun begins! Play one of the 56 different math missions. Each mission has touchable objects floating in space, including stars, coins, clocks, 3D shapes and even pizzas! Earn a bronze, silver or gold medal and also try to beat your high score. Missions range in difficulty from even/odd numbers all the way to square roots, so kids and their parents will enjoy hours of fun while learning math. 56 DIFFERENT MATH MISSIONS: ▸ Numbers / Fractions / Decimals ▸ Counting ▸ Telling Time ▸ U.S. Money ▸ Shapes (2D and 3D) ▸ Patterns ▸ Addition ▸ Subtraction ▸ Multiplication ▸ Division ▸ Square Roots ...and many more! FEATURES: ▸ 56 fun math missions that are different every time ▸ Over 90 colorful rocket parts ▸ Lively sound effects and music ▸ Fun arithmetic game with 3 difficulty levels ▸ Works on both iPhone and iPad - a universal app ▸ Choose from over 15 space-themed avatars ▸ Create up to five player profiles ▸ Rocket simulator is powered by a realistic physics engine ▸ Adjust music and sound settings ▸ Provides hours and hours of learning fun! Mathmateer® is an educational app for all ages that's actually FUN to play! PRIVACY DISCLOSURE: Mathmateer®: - Does not contain ads. - Does not contain in-app purchases. - Does not contain integration with social networks. - Does not use analytics / data collection tools. - Does include links to apps by Dan Russell-Pinson in the iTunes. For more information on our privacy policy please visit: http://dan-russell-pinson.com/privacy/
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.