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.
[Compatible devices] iPhone6 or later(Except for the iPhone SE).
$3.99 · 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 Chordana Composer: 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 features compared to professional music composition software.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: App stability issues and crashes.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Confusing user interface for beginners.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: High price for limited functionalities.
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.
[Compatible devices] iPhone6 or later(Except for the iPhone SE). [System requirements] iOS 11.0 or later required. An easy way to create your own original tunes! Chordana Composer makes it easy for you to write your own tunes, even if you don't know how to compose music. You can enter a motif (two-bar melody) using your choice of 3 input modes. There's no need to enter the melody for the entire tune. You just enter one motif and Chordana Composer automatically creates a whole tune, so you don't have to spend ages composing the music. Product Features 1. Three ways to enter your motif (2-bar melody) A melody that comes to you in the middle of an ordinary day... Have you ever thought: “This would make a really great tune. But I need to know how to compose, and it's no good if I can't read music. And that all takes time to learn”? Chordana Composer will take care of all those concerns. Just enter 2 bars of the motif you thought of. Chordana Composer will automatically make it into an entire tune. You can choose from 3 types of input method. In "Keyboard input mode" you use a virtual keyboard, in "Notation input mode, you paste the notes into a sheet of music, and in "Microphone input mode", you just sing the motif into the microphone. 2. Automatic composition by choosing "Genre" and "Concept" Once you've entered the melody using one of the modes above, you're ready for automatic composition. Choose whichever combination of "Genre", "Concept", "Range of melody movement" and "Level of melody tension" creates a tune that best matches what you've imagined. 3. Your own editing using the Hints function In Notation input mode, you can edit the the created melody yourself. If you enable the Hints function when you're editing the tune, the notation is color coded as a reference for your edits (notes that match the chord, notes in the same scale, notes that increase the tension and other notes you need to be aware of). 4. Using simple steps, you can upload your finished tune as a video to YouTube along with the staff notation, or slideshow of photos. You can also send your tunes as email attachments in AAC or MIDI format, and it's really easy to make your own ringtones*1 too. *1: To use your tune as an iPhone ringtone, you need to connect to a Mac or Windows computer and transfer the tune to your iPhone via iTunes.
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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.