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.
Your SkiErg just got a whole lot more interesting.
$14.99
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.
Kit ready. Verify your email to download it.
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 SkiEr: 3D SkiErg Training: 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.
Your SkiErg just got a whole lot more interesting. SkiEr turns your Concept2 PM5 into an immersive training experience. Connect via Bluetooth, pick a route, and ski through procedurally-generated 3D terrain — pine forests, mountain cabins, frozen lakes, and dynamic weather. Every stroke on your erg moves your skier forward in real time. It's like Zwift, but for the SkiErg. IMMERSIVE 3D ROUTES Ski 7 unique routes across varied terrain: • Alpine Sprint (5K, Easy) — Pine forests and gentle hills • Glacier Trail (5K, Moderate) — Icy valleys at sunset • Twilight Ridge (5K, Hard) — Moonlit ridge running • Nordic Valley (10K, Moderate) — Classic cross-country • Frozen Lake Loop (10K, Hard) — Heavy snowfall, low visibility • Sunset Peaks (10K, Moderate) — Golden hour mountain passes • Mountain Pass (21K, Extreme) — Half-marathon at altitude EARN MEDALS Every route has bronze, silver, and gold medal targets based on your pace. Chase the gold. Beat it. Then do it again. RACE YOUR GHOST PB A translucent skier representing your personal best glides alongside you. See exactly where you're ahead, where you're behind, and where to push. STRUCTURED TRAINING PLANS Follow one of 6 built-in plans to improve: • Beginner 4-Week — Build form and consistency • 5-Week 2K Improver — Chase your 2K personal best • HIIT Sprint Series — Pure power and speed • 6-Week Endurance Builder — Go longer, go further • Hyrox 1K Specialist — Train specifically for race day • Biathlon Conditioning — Build repeat power and recovery REAL-TIME PM5 CONNECTION Connects to your Concept2 PM5 via Bluetooth using both FTMS and Concept2's own protocol. See live pace, watts, stroke rate, distance, calories, and heart rate — synced stroke by stroke. INTERVALS THAT PUSH YOU Custom intervals with configurable work time, rest time, and rounds. Clear on-screen phase indicators and voice cues keep you locked in. TRACK EVERYTHING • Full workout history with detailed breakdowns • Personal records: fastest 2K, 5K, 10K times • Weekly trends over 12 weeks • Streak tracking • 25+ achievements across 6 categories WIDGETS Three widget types for your Home Screen and Lock Screen: Last Workout, Weekly Summary, and Streak. APPLE HEALTH, STRAVA & GAME CENTER Workouts sync to Apple Health as cross-country skiing sessions. Share to Strava with one tap. Compete on Game Center leaderboards for 2K, 5K, 10K times, best pace, and total distance. ONE-TIME PURCHASE No subscription. No account. Buy once, own forever. All data stays on your device. Works with Concept2 SkiErg. PM5 monitor required.
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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 integration with wearables and fitness trackers
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No customizable workout plans
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High subscription cost
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.