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.
MobileSheets is the ultimate sheet music viewer for the iPhone, iPad and Mac
$15.99 · 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 MobileSheets®: 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: Importing sheet music can be cumbersome and requires file management knowledge.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited annotation tools compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No collaborative features for sharing sheets with other musicians.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Pricing may be considered high for casual users.
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.
MobileSheets is the ultimate sheet music viewer for the iPhone, iPad and Mac. It frees you from having to lug around books and binders, and gives you the ability to access any score in your library in seconds. It also comes with a number of powerful features for musicians including: - Connect to other devices running MobileSheets on any platform, and easily share songs and setlists. - Synchronize device libraries using WiFi, bluetooth or the cloud - Multiple modes of operation including two pages side-by-side, half page turns, and vertically scrolling pages. - Hands-free page turns using any bluetooth or usb devices (including two and four pedal models), through the automatic scrolling feature, or by using face gestures such as an open mouth or smile. - Annotations for marking up music including support for freeform drawing, basic shapes, text and stamps - Connect multiple tablets over WiFi or bluetooth in book mode to display two pages at once - A custom audio player for playing audio tracks with your scores. Audio player supports a-b looping and multiple sizes. - Custom page ordering, making it easy to cut out unnecessary pages, repeat pages or change the sequence of pages without affecting the original document. - A metronome with multiple display modes and sound effects - Bookmarks for quick and easy access to sections in scores - Link points for handling repeats and quickly jumping between pages - Smart buttons that can be placed on a score to activate configurable actions when pressed - Support for multiple file types including images, PDFs, text files and chord pro files. - Support for importing CSV index files to break up large PDF songbooks - Support for communicating with MIDI devices over USB, Bluetooth and WiFi to load songs or trigger actions. - The ability to transpose chords in text and chord pro files. - Manual and automatic cropping to completely eliminate unnecessary margins - Support for setlists and collections to efficiently group songs for playback. - Powerful library management features with a huge list of supported metadata fields, giving you complete control over the data in your library - A free companion application for the PC that makes it a breeze to create and edit songs Give MobileSheets a try today and experience the freedom of having all your scores just a simple tap away. NOTE: This application does not include any sheet music - you must provide your own. This application can not play back PDFs, images or text/chord pro files. It can only display those files and play back audio files. The companion app is for your PC and is not included. You can download the companion app for free here: https://www.zubersoft.com/mobilesheets/companion.php Privacy Policy: https://zubersoft.com/mobilesheets/privacy_policy_ios.html Terms of Use: https://zubersoft.com/mobilesheets/terms_and_conditions_ios.html
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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.