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.
Every singer as an A4 folder of songs they bring to rehersal, but now they can have all of their lyrics with them all the time
$4.99 · 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.
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Combine features and design from your favorite apps.
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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 My Lyric Book: 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 for organizing lyrics.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Poor user reviews about app performance.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of sharing options.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline functionality.
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.
Every singer as an A4 folder of songs they bring to rehersal, but now they can have all of their lyrics with them all the time. You can also create setlists of songs which can be edited and reordered. Setlists and individual songs shared with the rest of the band by email, iMessage, Airdrop, or printing them out. Rather than searching online for other other people's versions of songs, this app displays your lyrics, which you've formatted as you want them (either on a computer or another app on your iPad). You can create them in Pages, Word, pdf, rtf or even jpg format then simply transfer them into the app. While initially designed for singers, PDF scores look amazing, so the whole band can get in on the act. Not only does My Lyric Book remember your lyrics and set lists, but songs can be tagged with a tempo for the built in metronome, or linked to tracks in your iTunes library so you can refer to a recorded version or play a backing track from within the app. You can even send and receive midi patch changes, so selecting a song programs your keyboard for you (or have your lyrics selected for you via midi)! If the rest the band is using the app too, then you can all sync up, so that the band leader can select songs and have them automatically selected on everyone's screens. (Note this DOES NOT distribute the lyrics, but selects each band member's version, so each band member can see their own parts as they've set up their devices). The app also automatically syncs with our backing track apps: My Playback and My Playback Solo. Of course your lyrics look even better on an iPad, but an iPhone or iPod has plenty of screen space to display lyrics and you can always have it in your pocket. You can use Airturn, Pageflip, M-Vave or other bluetooth pedals to scroll through your lyrics or select what each pedal does in the Settings app. NOTE: No lyrics are included with the App. It displays lyrics you've already prepared. Lyrics can be added from a computer, via the Files app, or imported from other apps. More info is on our website, including a series of tutorial videos: https://www.dctsystems.co.uk for more info. If you have any problems, then email me before leaving a negative review - I want the app to work great for you, and can usually sort out any problems. I can't respond directly to reviews, but most of the issues raised, could have been resolved by an email ([email protected])
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.