App Overview

Offline Music Player,Spotubes icon

Offline Music Player,Spotubes

Hong Kong Fanxin Interactive Technology Co., Limited · Music

Thank you for choosing our Offline Music Player.

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.5
219 ratings · Top 15%

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 included18 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.

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.

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

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Offline Music Player,Spotubes: map the core Music 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

Incorporate advanced playback features like crossfade and sleep timer.

Assumption to check: Limited offline playback features

Validate with people who use this workflow before building.

Hypothesis 2

Add options to share playlists and tracks on social media.

Assumption to check: No social sharing options

Validate with people who use this workflow before building.

Hypothesis 3

Implement a more robust download and sync mechanism.

Assumption to check: Occasional bugs with downloads

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to customize playlist covers and order of songs.

Assumption to check: Limited customization options for playlists

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

Thank you for choosing our Offline Music Player. We are about to soar through the world of music, playing your songs anywhere. No limits! No limits! No limits! Free Music Library Management The offline music player supports smart grouping by songs, albums, and artists. Use our free offline music player to search songs, albums, or discover popular new artists from around the world. Powerful Offline Music Player Supports background playback in full-screen or mini mode. The MP3 player also supports lock screen controls, widgets, driving mode, headset controls, and sleep timer. Supports Popular Formats Play music without needing to convert formats. Our music player is not just an MP3 player; it also plays MP3, AAC, WAV, FLAC, ALAC, M4A, and more. Offline Music Player Widgets Our free music app comes with interactive widgets in various sizes, supporting song switching and quick playlist playback. So you can enjoy music on your home screen or standby mode. Custom Music Scenes To better fit your environment — whether it’s a square, church, street, or library — we provide professional scenes to suit the music you play. Of course, you can also adjust according to your own preferences. Custom Music Equalizer To personalize your sound, the built-in equalizer in our music app offers many advanced audio features, such as music genre presets, custom equalizer, reverb adjustment, audio amplifier, and bass boost. Offline Music Editing The offline player can read ID3 tags and batch edit album art and songs. Create and Manage Playlists You can create playlists and personalized music categories for various scenes using our free offline music player. Cooler Skins Change your skin, change your mood. We offer packs like Rock Red, Glacier Blue, Premium White, and also support logo, theme color, and background changes. You can also customize based on your mood. Try our free music app to enjoy music your way without Wi-Fi. As one of the best offline music apps, it’s the best source for unlimited listening time. A must-have iPhone music player. --- Subscription Information Without subscription, you are in trial mode: • Limit on number of imported songs. • Limit on ringtone creation. • Limit on equalizer usage. • Limits on audio clipping, merging, converting, and playback speed. • Limits on scheduled play and auto shutdown. • Limits on driving mode. • Limits on themes and skins. With subscription, you get: • Unlimited access to songs and playlists. • Ringtone clipping to make it cooler. • Optimized scenes for church, library, street, or noisy places. • Lyrics creation for learning or songwriting. • Equalizer perfect for passionate music lovers. • Special features like audio clipping, merging, converting, and speed control. • Scheduled play and auto shutdown. • Exclusive themes and driving mode for the unique you. --- Note: If you subscribe via Apple, your App Store account will be charged at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. After purchase, you can manage subscriptions and auto-renewal in your App Store account settings. Privacy Policy: [https://www.wtqn.com/PrivacyPolicy.html](https://www.wtqn.com/PrivacyPolicy.html) Terms of Service: [https://www.wtqn.com/Terms.html](https://www.wtqn.com/Terms.html)

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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.

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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.