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
FaceAi: Face Swap Any Video
▶Transform Your Videos with Advanced AI Face Swap Technology
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
13,378 ratings · Top 30%
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.
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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/
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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 FaceAi: Face Swap Any Video: 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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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
Implement better error handling and optimize video processing algorithms.
Assumption to check: Users often face crashes during video processing.
Validate with people who use this workflow before building.
Hypothesis 2
Provide a wider range of filters and effects.
Assumption to check: Limited filter options for face swap.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance in-app communication regarding subscription benefits and features.
Assumption to check: Subscription model might not be clear to users.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize rendering performance to reduce waiting times.
Assumption to check: Long rendering times for edited videos.
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
▶Transform Your Videos with Advanced AI Face Swap Technology FaceAi delivers the most realistic AI video face swap experience powered by artificial intelligence. Swap faces in videos with unmatched accuracy for results that look completely natural. ▶Advanced AI Technology Our powerful engine uses deep learning to perform smooth and undetectable face swaps in videos. The AI analyzes facial structure, lighting, and movement to generate professional-grade replacements in every frame. ▶Effortless Video Face Swapping Upload any video and swap faces instantly. Replace yourself with celebrities, friends, or characters. Make funny edits, viral content, or stunning transformations for TikTok, Reels, YouTube Shorts, and more. ▶Key Features: AI video face swap technology Seamless face replacement in videos High-resolution output with natural motion Easy-to-use interface, no editing skills needed Optimized for short-form content creation Fast processing & accurate detection Start for free, upgrade anytime ▶Fast, Fun, and Free Just pick a video, choose the face you want to swap, and let FaceAi handle the rest. No complicated tools or learning curve. Pure AI magic in seconds. Download FaceAi now and explore the future of AI face swapping for videos. About FaceAi’s Premium Subscription: *The subscription covers FaceAi's premium usage. *FaceAi subscription period alternatives are 1 week and 1 year. *Based on your plan, every 1 week, or 1 year FaceAi subscription of yours renews. *Payment will be charged to your iTunes Account at only your confirmation. *FaceAi subscription automatically renews unless auto-renew is turned off. You can cancel your FaceAi subscription anytime via this URL: https://support.apple.com/en-us/HT202039 FaceAi's Privacy Policy: https://faceswapd.com/privacy FaceAi's terms of use can be found via this URL: https://faceswapd.com/terms
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 Navigation
Expo Camera
React Native Video
Zustand
Supabase
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.
