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.
App Overview
Looom
A new way to create hand-drawn animation
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.8
122 ratings · Top 50%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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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.
What's included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
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.
Differentiate and validate
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Looom: 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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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
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
Offer a wider variety of customizable brushes and effects.
Assumption to check: Limited brush options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement guided tutorials for first-time users.
Assumption to check: User experience can be confusing for beginners.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize rendering for better performance and fluidity.
Assumption to check: Performance issues with larger projects.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer information about premium features and benefits.
Assumption to check: In-app purchase clarity is lacking.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
A new way to create hand-drawn animation. So playful you’ll think it’s a toy, but it's secretly a robust app with a reimagined UI for animators and creators. Taking inspiration from music creation tools, using Looom feels more like playing an instrument than operating software - exploring lines, shapes and colors through loopable time and rhythm. Looom is all about looping animation with a smile. It was designed for professionals and beginners of any age and is already being used by some influential indie animators. A delightful environment to learn, experiment, practice and create drawn animation. Wonderfully musical, Next-gen dynamic non-destructive workflow. FLUID TIME No first frame or last. Looom’s threads are independent in length and speed, always tweak-able. INFINITE CANVAS Lets you go as deep or as far as you want thanks to a completely resolution-independent vector engine. OPEN-ENDED Looom uses SVG as it’s native file format. Your work can be viewed in browsers and opened in desktop animation software.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
FastAPI
react-native-gesture-handler
expo-camera
BUILD KIT DIFFICULTY
Advanced
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.
