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.
24-Hour Time Calculator makes adding, subtracting, and scoring 24-hour (military) time fast and effortless.
$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.
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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 24-Hour Time Calculator: map the core Productivity 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 functionality compared to comprehensive time management apps
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Only supports 24-hour time conversion
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No history tracking of past conversions
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No user customization 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.
24-Hour Time Calculator makes adding, subtracting, and scoring 24-hour (military) time fast and effortless. Whether you're a pilot, dispatcher, shift worker, or anyone managing schedules and logs, this app is designed for you. Enter start and end times, calculate time differences, or quickly solve 24-hour time math for any need. Key Features: • Instantly add or subtract 24-hour (military) time • Quickly calculate time differences for shifts, schedules, or logs • Persistent Time: Easily save and reuse a constant value - no more retyping the same number again and again • Automatic Clock Wrapping: Results always stay within 24-hour format - no more confusing answers like "25:00" • Simple, modern interface - no clutter, no ads • Designed for aviation, logistics, transportation, shift work, and anyone who needs accurate time math • Works great with typical flight plan and scheduling formats ----- How It Works: 1. Enter your starting time. (Example: "13:15" for 1:15 PM.) 2. Add or subtract the desired value. (Example: add "2:50" to get "16:05".) 3. Use the persistent time feature to save a commonly used number (like an offset or fixed block time), so you never have to re-enter it. 4. All results are automatically wrapped to the 24-hour clock - no more odd answers like "25:00". ----- Stop struggling with mental math or spreadsheets - 24-Hour Time Calculator helps you get the job done with confidence, every time.
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.