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
Playza - HD Video Player
Playza – HD Video Player
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.1
290 ratings · Below Average
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 Playza - HD Video Player: 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
Expand format support for a wider range of video files.
Assumption to check: Limited video formats supported
Validate with people who use this workflow before building.
Hypothesis 2
Implement adaptive bitrate streaming for smoother playback.
Assumption to check: Inconsistent playback quality
Validate with people who use this workflow before building.
Hypothesis 3
Add features like speed control and picture-in-picture mode.
Assumption to check: Lack of advanced playback controls
Validate with people who use this workflow before building.
Hypothesis 4
Streamline UI components for a cleaner design.
Assumption to check: User interface feels cluttered
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
Playza – HD Video Player Smooth. Powerful. All-in-One Video Experience. Playza is a fast and elegant video player designed to deliver a seamless viewing experience. Whether you're watching high-quality videos, managing your media, or converting files, Playza brings everything together in one simple and intuitive app. Key Features: • HD Video Playback Enjoy smooth playback with support for commonly used video formats and high-resolution content. • Video to Audio (MP3) Extract audio from your videos and save it for convenient offline listening. • Video Compressor Reduce video file size while maintaining good visual quality, making it easier to store and share. • Video Trimmer Trim and cut your videos quickly to keep only the parts you need. • Private Video Storage Keep your personal videos organized and protected within the app using built-in privacy features. Why Choose Playza? Playza is designed for users who want more than just a video player. With essential media tools and a clean, modern interface, it helps you watch, edit, and manage your videos effortlessly in one place. Simple and User-Friendly The app is built with a smooth and intuitive design, making navigation easy and ensuring a comfortable viewing experience. Get Started Download Playza – HD Video Player and enjoy a smarter way to watch and manage your videos.
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
Supabase
react-navigation
expo-av
@supabase/supabase-js
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.
