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
AI Avatar Generator - HeyGen
AI videos starring you.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
30,706 ratings · Top 5%
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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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 AI Avatar Generator - HeyGen: map the core Photo & Video workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
AI videos starring you. Record one short clip and HeyGen builds your avatar: your face, your voice, on video whenever you need one. Type a script and your avatar delivers it on camera. Same you, no reshoots. WHO IT'S FOR - Real estate agents: a video for every listing - Founders and solopreneurs: show up on camera without filming every time - Finance professionals: market updates and client explainers in your own face and voice, at the pace the market moves - Health and wellness creators: daily tips, routines, and programs on camera without daily filming CREATE YOUR AVATAR - Record yourself: one short video captures your look, voice, and expressions - Build from photos: a lifelike avatar from a few pictures - Avatar 4, photo-to-video: one face photo becomes a natural talking video - Design with AI: describe a look and get a custom avatar - Not ready to be on camera? Pick from thousands of stock avatars and switch to yours later MAKE VIDEOS WITH IT - Text-to-video: paste a script, your avatar speaks it - Video Agent: a prompt and an image become a finished video with b-roll and motion graphics - Your voice or ours: record audio or use AI voices with lip-sync - Captions built for social - Instant Highlights: long-form links become short clips - Video Translation: 100+ languages, still looking and sounding like you Trusted by 80% of the Fortune 100. Terms of Use: https://www.heygen.com/terms Privacy Policy: https://www.heygen.com/policy
Written user reviews are not shown here. Check current App Store reviews >
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
Provide more editing tools and advanced features for users to customize their videos.
Assumption to check: Limited customization options for generated videos
Validate with people who use this workflow before building.
Hypothesis 2
Optimize video generation algorithms for faster results.
Assumption to check: Occasional slow processing times for video generation
Validate with people who use this workflow before building.
Hypothesis 3
Create a clear explanation of what each subscription tier includes.
Assumption to check: In-app purchases may confuse users
Validate with people who use this workflow before building.
Hypothesis 4
Implement a robust search and filter system for templates.
Assumption to check: Difficulties in finding specific templates
Validate with people who use this workflow before building.
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
Axios
React Navigation
React Native Video
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.
