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.
Count how many laps each of your students has run and automatically calculate the total distance
$2.99 · 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 QR Laps: 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 compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: 3.2 rating indicates user dissatisfaction
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social sharing options
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.
Count how many laps each of your students has run and automatically calculate the total distance. Export the results. Everything happens without a single click and without entering a single name! The app counts how often a QR code is shown. The students have their QR code scanned after each round. Enter a lap length and the app automatically calculates the total distance run and creates a ranking list. This can be exported as a .csv file for further processing. INFO This app is based on the popular QR Counter and has been adapted to the wishes of sports teachers. The highlights are the automatic distance calculation, the prevention of cheating and the acoustic lap counter. HIGHLIGHTS -> NO CLICKS -> NO TYPING OF NAMES -> GET A RANKING -> SAVE AUTOMATICALLY Close the app and work on the same data the next day. All data is saved automatically. -> EXPORT -> MANUAL INTERVENTION Change the result by swiping right to add 1 point. Swipe left to remove 1 point. If there is a person without QR code, it is possible to manually add a counter. -> SELECT THE UNIT OF MEASUREMENT miles, yards, feets, kilometers -> AUDIO FEEDBACK The app calls the number of running laps after each scan. -> CHANGE CAMERA Choose between front or back camera. -> NO CHEATING POSSIBLE After each scan, the code is locked for 10 seconds. -> MISSING QR CODE? It's possible to add a counter manually. Just type in the name and click the add button. Tip for maximum performance: Use any smartphone for up to 12 students. This avoids traffic jams. -> CREATE MULTIPLE QR CODES ONLINE AT http://www.teaching-apps.com Simply type in all names/items at once and get multiple QR codes in a PDF, which you can then print and save. It couldn’t be any easier! Each QR code is embedded in a student ID card in a credit-card size. These cards can be used for different apps and uses.
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.