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.
got a song idea? simply sing and record.
Free · 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 SongMaker: 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 audio editing features compared to professional DAWs
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Free tier limits the number of songs that can be saved
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface can be confusing for new users
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of collaborative features for sharing songs
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.
got a song idea? simply sing and record. your recording will become a new song ready to play. for musicians and songwriters, songmaker will help you prototype your song idea with diverse melody generation options. for music enthusiasts, songmaker will lead you to burst your creativity while letting you enjoy music in a different way than you might have experienced. unlike other karaoke apps, songmaker encourages you to sing with your own words and melody. • smart auto-tuning songmaker automatically tunes your voice based on the music scale, tempo, chord progression of the backing track. • tuning variation options once you've done recording, you are free to generate a variety of melody lines and harmonies in real-time by adjusting options such as tuning level, pitch level, setting chorus mode for each measure, etc. • import any tunes with ai-powered vocal remover import tracks from files and music library. you may choose to apply vocal remover. additionally, the app will auto-detect key, tempo, and chords of the track for the vocal tuning options to work best. • music score your recording will be drawn as a piece of professional sheet music and you may play the song while seeing it. • customizable backing track you can easily customize the background track with pre-recorded loops. for each loop, you can select a different combination of instruments. • variety of genres and styles diverse genres of backing tracks are available for download. more than 120 tracks are available, all for free. • share & export you may choose to share/export to other apps as: - audio - video with your photos in sync with audio - music sheet (image files or a pdf file) - video with music sheet and audio contact: [email protected] of use: https://www.songmaker.app/terms.htmlprivacy policy: https://www.songmaker.app/privacy.html
Written user reviews are not shown here. Check current App Store reviews >
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.