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.
**Everything you need to capture a song idea**
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 Demo: Songwriting Studio: 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: Users find it difficult to manage and organize their songs effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited melody recording features.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Saving songs can be confusing for users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of collaboration features.
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.
**Everything you need to capture a song idea** Anyone can write a song anywhere with Demo, the mobile songwriting studio—no instruments or theory required: • Generate playable chords: Build your own or try pre-built progressions with a single tap • Write + build: Write lyrics with a rhyme tool and loop progressions to build the backbone of your song • Record audio: Capture vocals or any audio ideas with a multi-track recorder • Export what you need: Export mixed, stems, MIDI files, or a chord sheet • Sync to iCloud: Access your songs across devices or save storage space on your phone • CoWrite: Share songs with bandmates or collaborators to work together on one project The songwriting tool built by and for songwriters, no matter your musical expertise. Get unlimited access to over 100 exclusive features with Demo+ and join us in democratizing songwriting! SUBSCRIPTION PRICING, TERMS, & CONDITIONS: The Demo+ subscription is $39.99 USD per year or $5.99 USD per month. Pricing in other countries may vary, and charges may be converted to your local currency depending on the country you live in. DEMO+ YEARLY Demo+ Yearly Subscription starts with a free 3-day trial period. Once the trial is over, a recurring billing period of $39.99 per year automatically begins upon subscription. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. DEMO+ MONTHLY: Demo+ Monthly Subscription enables access to all app features. A recurring billing period of $5.99 per month automatically begins upon subscription. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. Terms of Use: https://madewithdemo.com/terms-of-use/ Privacy Policy: https://madewithdemo.com/privacy-policy/
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.