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.
Pass your beep test: precise beeps that never drift, results that actually save, and the exact target level for your agency.
$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 Beep Test & PACER Trainer: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Pass your beep test: precise beeps that never drift, results that actually save, and the exact target level for your agency. The multi-stage fitness test is simple and unforgiving — run 20 metres, turn on the beep, do it again a little faster every minute. Almost everything that makes it hard to train for is a timing problem, so that is what this app gets right. BEEPS THAT DO NOT DRIFT The whole test is built as one continuous, sample-locked audio track — not a repeating timer. Level 1 through level 21 stays in perfect time from the first beep to the last, with your screen locked, your phone in an armband, and your own music still playing underneath. A triple beep marks every level change, and a count-in gets you on the line. EVERY TEST SAVES ITSELF The moment you stop, the result is written: level and shuttle, shuttle count, distance, elapsed time and your estimated aerobic capacity. No Save button to forget. Your history and personal bests are there the next time you open the app, and the next time after that. THE LEVEL YOUR AGENCY ACTUALLY WANTS Pick who you are training for and the target sits on screen for the whole test, flipping the second you pass it: • Australian Army — general entry, combat support, special forces • Royal Australian Air Force — general entry, security forces, physical training instructor • Royal Australian Navy — clearance diver, physical training instructor • NSW Police, Victoria Police, Queensland Police, South Australia Police, WA Police • Queensland Fire and Rescue, Fire Rescue Victoria, NT Fire and Rescue • UK police — standard, public order, dog handler, authorised firearms officer • British Army and UK fire and rescue Every entry shows where the number came from and the date it was checked. Standards change, so a custom target lets you set any level yourself. 20 METRES OR 15 METRES Both protocols, properly implemented. The 20 m test is the ADF and Australian standard: 21 levels, 247 shuttles, 4,940 metres. The 15 m test is what the UK police and fire Job Related Fitness Test actually runs on: 17 levels, its own shuttle times, its own scoring. Switch between them in one tap. ON YOUR WRIST Open Beep Test on your Apple Watch and your level and shuttle appear there, with a tap on every turn and a triple tap when the level steps up. Useful when your phone is at the end of the track and you are not. WORKS THE WAY YOU TRAIN • One price, everything included — no subscription, no ads, no in-app purchases • Completely offline. No account, no sign-up, no data leaves your phone • Estimated VO2 max from your score, with the fitness band it falls in • Personal bests per course, a seven-day training strip, and your full history The beep test is a maximal effort. Warm up, run on a flat non-slip surface with clear space at both ends, and stop if you feel unwell. Estimated aerobic capacity is a fitness guide calculated from your score — it is not a medical measurement or medical advice. Beep Test is an independent app. It is not affiliated with, endorsed by, or connected to any of the agencies whose published target levels it lists. Always confirm the current requirement with the agency before you test.
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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: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited data visualization
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No voice cues for guidance
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No community support
Validate with people who use this workflow before building.
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.