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.
Particle Generator is an interactive particle visualizer with a video capturing option
$2.99 · 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 Particle Generator: map the core Graphics & Design 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: Difficulty in customizing particle effects.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of variety in particle shapes and effects.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inadequate saving and loading of user-generated particles.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High complexity for new users.
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.
Particle Generator is an interactive particle visualizer with a video capturing option. You can create your own custom particle visual effects and record them in video mode. Lastly, you can use the video for creative purposes. Features: • 9 particle textures available for selection • Ability to set a custom texture by loading an image from the library • Touch to set particle emission position • Adjustable particle emitter options: Position, Angle, Speed, Alpha, Scale, and Rotation • Ability to set particle color gradient • Ability to set background color • Save/load particle presets • Save particle effect snapshots to the camera roll • Save particle effect videos to the camera roll Particle Settings Quick Explanation Emitter Birthrate = [100] particles born per second Maximum = [0] is infinite. If set to a specific number, e.g., [1000], particles will stop once the limit is reached Lifetime Start = [20] each particle lives for [20] seconds before disappearing Range = [5] each particle lives for 20 ± [5] seconds Position Range X = [80] particle birth range in width Y = [80] particle birth range in height Angle Start = [0] particle starting angle in degrees Range = [60] particle starts at 0 ± [60] degrees Speed Start = [50] moves at [50] velocity Range = [10] moves at 50 ± [10] velocity Acceleration X = [0] negative for acceleration to the left, positive for right Y = [0] negative for acceleration downward, positive for upward Alpha Start = [0.5] initial alpha value ([0] = transparent, [1] = opaque) Range = [0.3] alpha range: 0.5 ± [0.3] Speed = [-0.05] animates particle transparency (negative = more transparent, positive = more opaque) Scale Start = [0.5] initial scale Range = [0.2] scale range: 0.5 ± [0.2] Speed = [-0.05] animates particle size (negative = smaller, positive = larger) Rotation Start = [30.0] starting rotation angle in degrees Range = [120.0] rotation range: 30 ± [120] degrees Speed = [-0.02] animates rotation (negative = clockwise, positive = counterclockwise) Create distinctive, beautiful particle effects with plenty of customization options. You can create rain effects, fireworks, or any abstract art effect and enjoy the colorful particle show. This particle show brings joy and a cheerful atmosphere to your device. Thanks for your support, and do visit nitrio.com for more apps for your iOS devices.
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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.