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 by Apple in App Store in 2009**
$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.
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Combine features and design from your favorite apps.
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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 Baseball Speed: map the core Sports 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 features for data analysis and historic tracking
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Basic user interface
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No cloud sync for data
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 by Apple in App Store in 2009** "Baseball Apps That Hit It Out Of The Park" We have been away for a while, but coming back to a device near you! NEW WITH VERSION 3.0.0 NEW IN 3.0: - Modern iOS design - GPS field location tracking - And much more!" OTHER FEATURES • Create a TEAM • Add Pitchers • Select Pitchers to track their pitches • Choose Pitch Type and Pitch Result when in Expert Mode • Pitch Counter has been added • Enter the Pitcher stride to get a more accurate speed calc • Export recorded pitches to .csv for importing into your favorite spreadsheet program Getting Started with v3.0.0 To use Expert Mode, for accurate tracking of pitchers (1) create a TEAM first (2) create your pitcher(s). Pitcher EDIT functionality is coming soon. Have you ever been to a baseball game whether it is a little league, pony league, softball, or even major league and was just wondering how fast that pitcher is pitching? Radar gun not available? With this App you can get a very good indication how fast a pitcher is pitching. Measuring this speed is done with a simple calculation as long as you know the distance. With Baseball Speed, all you have to do now is tap START as soon as the pitch leaves the pitcher hand then tap STOP when the catcher catches or if the batter hits the ball to get the speed. If you have ever wanted to measure a pitcher's speed then "Baseball Speed" is just for you. Not only is this app for the fan, but coaches can use it as a great defensive tool to find out when a pitcher has had enough or an offensive tool to let the batters know what to expect. Little League players really enjoy knowing that they just threw a ball 45 mph or even faster. This app gives them some good bragging rights with all of their friends. Using the app is simple. You start the timer as soon as the ball leaves the pitcher's hand and stop it when the pitch reaches the catcher's glove or when the batter makes contact. Don't forget to select the CHANGE FIELD button to change from the wide list of ball fields and leagues. Choose from a variety of softball and baseball fields/leagues: - 8U, 9U, 10U, 11u, 12u, 13u, 14u, 15u, 16u, 18u - Little League - Pony League - Minor League - Major League - Fast Pitch Mens Softball - Fast Pitch Womens Softball - Custom Pitch Distances * Please feel free to send the developer feature requests. * If I can make this app better for you, please just let me know. Yappler-Tags: baseball, little league, pitcher, pitch count, radar, softball, pitching, cricket, sports, speed
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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.