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.
INTVL: The World Is the Game.
Free · 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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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 INTVL: 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.
INTVL: The World Is the Game. INTVL turns every walk, run or bike ride into a game played on the real world globe. The idea is simple. When you run or ride in a loop, the ground inside that loop becomes your territory. The bigger, smarter and more tactical your routes, the more of the map you hold. Claim your territory Every loop you complete claims real space. Other players are out there doing the same thing, so the map is always moving. You can take a new route to take new ground, or go back over an area to defend what's already yours. Play it your way Some people want to be the best in the world, so they chase the global leaderboard. Others care more about home turf and work to become the territory leader of their own suburb or city. Both are worth playing for, and you can switch focus whenever you want. Hold ground, win real prizes Every bit of the map you hold earns you entries into our competitions, where the prizes are real. The more territory you hold at the end of the competition, the better your odds. Run and ride with clubs Join a club and play as a team. Your territory adds to your club's total, so a good capture from you helps everyone you're playing alongside. A feed built around the game INTVL has a social feed where you can follow other players, see their activities, and cheer them on. It's a good way to find people around you and stay connected to other athletes around the world. Bring your own gear INTVL works with the devices you already train on, so your activities sync straight into the game: - Garmin - Suunto - Polar - Coros - Fitbit - Hammerhead - Wahoo We built INTVL to give a new meaning to fitness. Movement without stakes is just exercise. The world is the game. Take it. This app integrates with Apple Health (HealthKit) to show insights about your activity, including steps, heart rate, and previous runs. Privacy Policy: https://www.intvl.com.au/privacy-policy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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 customization options for workouts
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of social features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent performance tracking
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Subscription model may deter users
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.