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
KMPlayer+ Divx Codec
▶ KMPlayer, Customer Lounge is here!
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.9
51 ratings · Top 50%
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 included19 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for KMPlayer+ Divx Codec: map the core Entertainment 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 broad codec support and regular updates.
Assumption to check: Limited codec support compared to other players
Validate with people who use this workflow before building.
Hypothesis 2
Implement adaptive bitrate streaming for improved experience.
Assumption to check: Inconsistent streaming performance
Validate with people who use this workflow before building.
Hypothesis 3
Provide better offline downloads management and viewing.
Assumption to check: Lack of offline content management
Validate with people who use this workflow before building.
Hypothesis 4
Simplify navigation with clear tabbed layout.
Assumption to check: Complex navigation structure
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
▶ KMPlayer, Customer Lounge is here! ▶ Feedback, ideas, and events—all welcome. - Link: https://cobak.co/en/space/392 ▶ KMPlayer Plus (Divx Codec) officially support Divx codec. Please check up codec which is not supported. [ Supported codec ] Avi File : DXMF, DX50, DIVX, DIV4, DIV3, MP4V MKV File : DX50, DIV3, DIVX, DIV4, MP4V [ Not supported codec ] DTS, EAC3, TrueHD eac3, mlp, trhd, dts, dts, dtsb, dtsc, dtse, dtsh, dtsl, ms [ Supported Subtitle Format ] DVD, DVB, SSA/ASS Subtitle Track. SubStation Alpha(.ssa/.ass) with full styling.SAMI(.smi) with ruby tag support. SubRip(.srt), MicroDVD(.sub/.txt), VobSub(.sub/.idx), SubViewer2.0(.sub), MPL2(.mpl/.txt), TMPlayer(.txt), Teletext, PJS(.pjs) , WebVTT(.vtt) ▶ Function for KMPlayer Plus (Divx Codec) Media Player Function Bookmark : Bookmark on your wanted position to play. High definition video playback: HD, 4K, 8K, UHD, Full HD playback. Color adjustment: change brightness, contrast, hue, saturation, gamma information Zoom in video: Zoom in and move the video you're watching Section repeat: Repeat after section designation Invert video: Invert left and right (mirror mode), upside down Quick Button: Select and specify player options with one click Equalizer: Use equalizer for music and video Speed control: Playback speed control function up to 0.25 ~ 4 times Beautiful UI: beautiful music and video playback UI Subtitle Setting: Change subtitle color, size, position Timer function: Video and music timer function Other Functions Sharing via Wi-Fi: Using Wi-Fi file transfer between a PC and mobile without a wired connection. Search function: Search music and video you want My List (Playlist): Create video and music playlist Play URL: Play any video on web by entering a URL (Streaming) Network: Private server connection by FTP, UPNP, SMB, WebDAV Cloud: Play music and content within Dropbox, OneDrive ▶ Access Permission Information Selectable Permission Storage: Request for access to photos, music, and videos stored on the device * You can use the basic service even if you do not agree with the selectable permission. (However, functions that require selectable permission cannot be used.) ▶ Contact Email : '[email protected]'
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
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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.
