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.
RunEasy is a Zone 2 training coach that lives on your Apple Watch
$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.
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 RunEasy.: 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: Lack of personalized training plans
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited social features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Not tracking nutrition or weight data
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No integration with wearables
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.
RunEasy is a Zone 2 training coach that lives on your Apple Watch. It uses real-time talk tests — not just heart rate — to tell you whether you're actually in zone 2. During your run or ride, RunEasy periodically asks you a simple question through the watch speaker. Just answer out loud. Based on how you sound — your breath patterns, vocal strain, and speech fluency — it determines whether you need to slow down, speed up, or keep going. KEY FEATURES - Talk Test Analysis: Speaks a prompt, listens to your response, and analyzes 6 dimensions of your voice to assess effort level - Heart Rate Monitoring: Real-time BPM with automatic talk test triggers at key HR thresholds - Run + Ride: Full support for both running (min/mi pace) and cycling (mph) - Zone 2 Verdict: Clear green/red feedback — In Zone 2, Above Zone 2, or Below Zone 2 - Workout Summary: See your time in zone 2, a color-coded timeline, and results from every talk test - Calibration Mode: Gradually increase effort to find your personal zone 2 pace boundary - Music Friendly: Briefly pauses your audio for talk tests, then resumes automatically - Session History: Track your zone 2 consistency over time HOW IT WORKS 1. Pick Run or Ride and start your workout 2. As your heart rate climbs, a voice prompt plays through your watch speaker 3. Answer the question out loud — like you're talking to a friend 4. RunEasy analyzes your breathing, fluency, and vocal strain 5. Get instant feedback: stay in zone, slow down, or push harder Zone 2 training builds aerobic fitness, burns fat, and improves endurance — but only if you're actually in zone 2. Heart rate alone can be misleading. RunEasy gives you the real answer.
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.