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.
Evermusic Pro - Cloud & Offline Music Player for iPhone and iPad.
$39.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Evermusic Pro: music player: 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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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
Assumption to check: Limited free features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Difficult to manage large libraries
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent audio playback quality
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Cluttered user interface
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Evermusic Pro - Cloud & Offline Music Player for iPhone and iPad. Stream your music library from the cloud, listen offline, and take full control of your sound — no limits, no ads. Evermusic Pro combines a powerful audio player, equalizer, playlist manager, and file organizer in one beautiful app. • PLAY ALL AUDIO FORMATS Evermusic Pro supports the most popular audio formats: MP3, AAC, M4A, WAV, AIFF, ALAC, M4B, and many others. • CONNECT YOUR CLOUD Create your own music streaming service by moving your music library to the cloud. Listen to your music directly from the cloud, freeing up space on your iPhone for photos and new apps. Access music from popular cloud services like iCloud, Google Drive, Dropbox, OneDrive, pCloud, and many others. Privacy-focused services like MEGA, Internxt, and Proton Drive are supported as well. • CONNECT MEDIA SERVERS Connect Plex, Subsonic, Navidrome, Jellyfin, and Emby media servers with your library easily. • CONNECT YOUR COMPUTER OR NAS Connect using SMB, WebDAV, DLNA, FTP, SFTP, and NFS protocols. Advanced buffering technologies ensure smooth playback. Connect to personal NAS storage using native APIs for QNAP, WD My Cloud Home, Nextcloud, and Synology Drive. Import audio files from your computer using iTunes File Sharing and Wi-Fi file transfer. • OFFLINE MUSIC Download your favorite songs, albums, and artists to listen offline. Enable the audio player cache to automatically download recently played songs. • AUDIO EQUALIZER The built-in equalizer offers presets for popular music genres, plus manual settings to fine-tune your sound and boost your audio. • GAPLESS PLAYBACK Enjoy smooth playback with no pauses between songs, perfect for concept albums and classical music. • CROSSFADE PLAYBACK Enjoy continuous playback with the crossfade feature, where the next song starts before the current one ends. • AUDIO EFFECTS Make your music sound the way you like with built-in audio effects. Turn on volume normalization to keep every track at the same loudness, and adjust playback with reverb, delay, distortion, and spatial audio. • MUSIC VISUALIZER Watch full-screen animated visuals that react live to your music. Choose from a large library of presets, or let them cycle. • LYRICS AND COMMENTS View embedded timed lyrics and comments for your audio tracks. Activate the lyrics widget on the Home Screen for quick access. • AIRPLAY & CHROMECAST Stream music to Apple TV, smart speakers, or other devices with AirPlay or Chromecast. • APPLE CARPLAY Drive and listen safely with an interface designed for CarPlay. • WIDGETS Activate interactive Home Screen widgets for fast access to your playback queue and continue playback from the last saved position. • AUTOMATIC SYNCHRONIZATION Your music library automatically syncs between the cloud and your device, grouping songs by artist, album, and genre. • AUDIOBOOKS Use the app as an audiobook player with features like audio bookmarks, playback speed control, and media position saving. • PLAYLISTS MANAGER Create and manage playlists, reorder songs, and make playlists available offline. Sort songs by name, size, track number, or album. • ID3 TAGS EDITOR Edit audio tags to view detailed metadata or correct corrupted information in your files. • FILE MANAGER Organize, move, rename, and manage your audio files directly in the app. • ADVANCED SEARCH The smart search engine helps you find your favorite albums, artists, and songs in your music library. • USB FLASH CARDS Connect external card readers like the SanDisk iXpand and listen to music directly from your SD card. ---------- Evermusic Pro is your all-in-one music player, cloud streamer, downloader, and file manager for iPhone and iPad. Great for music lovers, bands, producers, audiophiles, students, and audiobook listeners. Privacy Policy: https://www.everappz.com/privacy-policy Terms of Use: https://www.everappz.com/terms-and-conditions
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.