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.
A new design stopwatch app.
$1.99 · 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 Stopwatch&Memo: map the core Health & Fitness 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: The app has poor ratings due to bugs and crashes.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited features compared to other stopwatch apps.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases are not clearly explained.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User interface is not appealing.
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.
A new design stopwatch app. Do you keep a record on paper every time you train? You can save the measured time with this app. You can also start and stop with the volume button, so you can keep track of the players while watching them. 【Save record】 You can save all the measured records. The date and time are also recorded, so you can look back at past records and see how fast it is. It can also be graphed, allowing you to analyze your records to help improve your practice curriculum. 【Start / Stop with volume button】 You can start and stop by pressing the volume button on the side of the iPhone, so you can avoid situations such as "I thought I stopped, but I couldn't do it!". You can start and stop while looking at the players instead of the iPhone screen. 【Folding】 Since it is possible to divide into folders, you can keep a record for each person to measure, each competition, and each distance. 【design】 Since the stopwatch part can be moved up and down, you can expand the area where you can see the record and the stopwatch part. Please use it according to your own ease of use. In such a case ... ・ Measurement of children's practice records for the tournament ・ Time measurement for 100-mass calculation ・ Measurement of running time ・ Graphing recorded data It will help you to improve your motivation to break records and improve your practice curriculum by using data. Available for runners, sports trainers, parents, teachers, students and more!
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.