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
Timecode Stamper
Transform your videos with professional timecode overlays
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
8 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 included15 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 Timecode Stamper: 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
Offer more fonts, colors, and styles.
Assumption to check: Limited customization options for timecodes
Validate with people who use this workflow before building.
Hypothesis 2
Enable users to apply timecodes to multiple media at once.
Assumption to check: Lack of batch processing for multiple media
Validate with people who use this workflow before building.
Hypothesis 3
Implement cloud backup for user media.
Assumption to check: No cloud storage for saved media
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social media sharing and export options.
Assumption to check: Inadequate sharing options
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 professional timecode overlays Timecode Stamper is the ultimate tool for adding precise, customizable timecode overlays to your videos. Perfect for filmmakers, content creators, researchers, and anyone who needs accurate time references in their footage. KEY FEATURES Professional Timecode Options - Actual time display - shows real-world timestamps - From-zero mode - starts counting from 00:00:00:00 - Automatic frame rate detection for precise accuracy - Support for various video formats and frame rates Complete Customization - Choose from 15+ professional fonts optimized for video - Adjustable font size (50% to 300% scaling) - Custom background colors with opacity control - Four corner positioning options - 360 degree rotation capability (0, 90, 180, 270 degrees) - Left, center, or right text alignment Rich Metadata Integration - Automatic extraction of video creation date and time - GPS coordinates overlay (when available) - Time zone detection and display - Custom text overlay (up to 25 characters) - Comprehensive metadata preview Smart Video Processing - Real-time preview before processing - Preserves original video quality - Maintains audio synchronization - Progress tracking with percentage display - Automatic save to Photos library Universal Design - Optimized layouts for iPhone and iPad - Intuitive touch controls - Modern, clean interface - Comprehensive font selection with live preview PERFECT FOR - Film & Video Production - Add professional timecode for editing reference - Content Creation - Timestamp your footage for easy organization - Research & Documentation - Precise time references for analysis - Security & Surveillance - Add timestamps to recorded footage - Sports Analysis - Frame-accurate timing for performance review - Education - Create time-referenced instructional videos HOW IT WORKS 1. Select any video from your Photos library 2. Customize your timecode appearance and position 3. Preview the overlay in real-time 4. Process your video with professional quality 5. Save the timestamped video back to Photos TECHNICAL EXCELLENCE - Built with cutting-edge SwiftUI and AVFoundation - Supports all modern iOS video formats - Intelligent metadata extraction from various sources - Frame-accurate timecode generation - High-quality video export with no compression loss Requirements: iOS 18.0 or later. Compatible with iPhone and iPad. Privacy: Timecode Stamper only accesses videos you specifically select. No data is collected or transmitted. All processing happens locally on your device. Start creating professional timestamped videos today with Timecode Stamper!
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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
React Navigation
Zustand
expo-camera
React Native Color Picker
BUILD KIT DIFFICULTY
Intermediate
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.
