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.
SMASH EVERY CASTLE
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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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 Castle Busters: map the core Games 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.
SMASH EVERY CASTLE. RULE EVERY ARENA. Build your defenses, choose your crew, and smash your opponent's hard work to pieces in Castle Busters, a turn-based online PvP battle game. Just you, your rival, and two castles that won't both survive the match intact. And you'd only just finished decorating! MAKE EVERY SHOT COUNT Take aim and fire. Your crew brought the firepower. Your opponent kindly supplied the target. In fast 1v1 battles, every shot changes what happens next. Blast through walls to open new angles and collapse towers to expose enemy heroes. Win by taking out their entire crew or turning their castle into rubble. With physics-based artillery and a battlefield that falls apart, you'll need to think on your feet. They can't hide behind a wall you've already demolished. DRAFT YOUR CREW Some heroes bring the damage. Others rally the crew to hit even harder. And some bring teammates back from the dead because nobody said they could leave yet. Mix and match heroes whose abilities work together. Build around your favorites, discover powerful combinations, and find a crew that suits your playstyle. YOUR CASTLE. YOUR DESIGN. Build a castle worth showing off, then roll it into battle. Yes, it's on wheels. Fortify your walls, position your heroes, and choose gadgets that suit your strategy. Test your setup in battle. Putting your plan together is almost as satisfying as watching theirs fall apart. RAISE YOUR GAME Level up your heroes and unlock new faces for your crew. Each new arrival brings a different ability to play with and another reason to rethink your lineup. Earn rewards from the Forge as you upgrade your squad and stronghold. Who knew you could get rewarded for being such a destructive influence? CLIMB THE RANKS Earn trophies and progress through the arenas on Trophy Road. Unlock Ranked mode and compete on the leaderboards for rewards and bragging rights. You'll need to outthink your rivals, not just outshoot them. The view from the top is lovely. Expect incoming fire. The arena is open. Go break something. FREE TO PLAY Castle Busters is free to download and play. Some in-game items are available for purchase. A network connection is required. Suitable for players 13+.
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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 character variety and depth.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Repetitive gameplay mechanics after a few levels.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can feel pay-to-win.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Ads can disrupt gameplay flow.
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.