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
Azul - Video Player for iPhone
Never be bored on a plane or subway ride again
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
500 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 included16 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 Azul - Video Player for iPhone: map the core Travel 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 and provide clearer user guidance.
Assumption to check: Limited video formats supported
Validate with people who use this workflow before building.
Hypothesis 2
Implement adaptive streaming for better quality.
Assumption to check: Inconsistent playback quality
Validate with people who use this workflow before building.
Hypothesis 3
Add features to share videos via social media.
Assumption to check: No social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Introduce tagging and sorting for easier management.
Assumption to check: Lack of video organization tools
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
Never be bored on a plane or subway ride again. Enjoy your favorite videos right on your device without converting or needing a data connection. Azul is the only movie player that allows you to play almost any video and audio format on the go. Not only that the app has powerful streaming options, subtitle support, Airplay and Chromecast too. Gorgeous interface. Precise controls. And silky-smooth playback. Play all your movies, shows and music in most formats directly without conversion. It allows file synchronization with Dropbox, GDrive, OneDrive, Box, iCloud Drive, iTunes, direct downloads and through WiFi sharing as well as streaming from SMB, FTP, UPnP/DLNA media servers and the web. Azul offers support for advanced subtitles including full SSA compatibility, multi-track audio, and playback speed control. - PLAY MORE VIDEO TYPES A powerful video player that plays just about anything, including the standard MP4, M4V and MOV – plus MKV, AVI, WMV, MTS, ISO, VIDEO_TS, FLV, OGM, OGV, ASF, 3GP, DVR-MS, WebM, and WTV. - STREAM FROM OTHER DEVICES Browse and play videos stored on your Mac, PC, NAS, Wi-Fi hard drive, UPnP/DLNA apps like Plex and Kodi (XBMC), or from cloud services like Dropbox, Google Drive, and OneDrive – no syncing required! - AIRPLAY & GOOGLE CAST OPTIONS Stream a wide variety of videos types such as MKV, MP4, M4V, and others over AirPlay & Google Cast with full surround sound and subtitles. - OPTIMIZED SUBTITLES Bring your own subtitles, or download them on the fly (for free) in virtually any language. - Silky-smooth video player (plays full 4K w/ HDR & Dolby Vision) - Stream from a Mac, PC, NAS or Wi-Fi enabled hard drive - Beautiful layout with quick access to video info - Artwork and metadata added automatically - Split View & PIP SUPPORTED FORMATS - Video: 3GP, AVI, ASF, BDMV, DIVX, DVDMEDIA, DVR-MS, FLV, ISO, M4V, MKV, MOV, MP4, M2TS, MTS, OGM, OGV, TP, TS, VIDEO_TS, WEBM, WMV, WTV PLAYER FEATURES - Multiple audio tracks - Chapters - Gesture controls - Video zoom options - Continuous playback - TV out via HDMI or VGA adapter - Deinterlacing EXTRAS - Folders - One-click subtitle downloads - Download videos from networked devices - Drag and drop uploads via web browser We strive for 100% customer satisfaction -- Send us an email at [email protected] and we'll be more than delighted to help.
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
Firebase
React Navigation
Axios
Redux
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.
