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.
Become the ninja
$1.99 · 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 Jutsu Simulator: Ninja Power: map the core Entertainment 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: Limited jutsu variety may lead to user boredom
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Some users report difficulty navigating the app
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: In-app purchases can be confusing for users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of social features may reduce engagement
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.
Become the ninja. Form the hand signs, shake your device, and unleash explosive energy and elemental techniques — with stunning animations, real sound effects, and haptic feedback you can feel. Jutsu Simulator turns your phone into a ninja arsenal. Each technique is hand-crafted with layered particle effects, immersive audio, and vibration that reacts to every cast. — TECHNIQUES — • Spiral Orb — a swirling sphere of pure energy (A-Rank) • Lightning Palm — a piercing bolt of focused power (A-Rank) • Wind Shuriken — a razor storm of wind (S-Rank) • Fire Breath — scorch the screen in flame (C-Rank) — FEATURES — • Shake-to-cast motion controls — move like a real ninja • Cinematic 60fps animations built for smooth performance • Authentic sound effects for every technique • Haptic feedback that makes each jutsu feel alive • Unlock higher-rank techniques as you progress • Step-by-step tutorials for every hand sign • Full English and Portuguese support • Dark, immersive interface Whether you're an anime fan, a ninja at heart, or just love satisfying energy effects, Jutsu Simulator puts elemental power in the palm of your hand. Train. Cast. Master every technique. Download now and begin your ninja journey.
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.