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.
The ultimate orchestra sound app for sophisticated musicians by award-winning sound designer Kurt Ader, designed as professional sound module for your iPad, iPhone or iPod touch by connecting an external MIDI keyboard...
$9.99 · 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 iSymphonic Orchestra: 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 free features with a paywall
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Average user rating of 3.8/5
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline mode for downloaded scores
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.
The ultimate orchestra sound app for sophisticated musicians by award-winning sound designer Kurt Ader, designed as professional sound module for your iPad, iPhone or iPod touch by connecting an external MIDI keyboard, using the Apple USB camera adapter or another adapter supported by Apple.¹ Listen to the demo videos on our product website! This app supports Audio Unit and Inter-App Audio for audio & MIDI connections from/to other audio apps, as well as Bluetooth LE MIDI ! iSymphonic Orchestra was designed with the goal to deliver you superb, extremely realistic and stunning orchestra sounds, instantly with the first key being pressed by you on your MIDI keyboard. Just select a sound and you are ready for your live performance or for a boost of creativity while composing new songs. The sounds used in this app were explicitly recorded to fulfill these requirements and involved several months of recording and post processing under supervision of Kurt Ader and included a variety of innovative, new recording techniques. So far these sounds were only available to very few, famous movie composers. Now they are finally available for the first time to everybody. The supreme quality of these sounds, combined with the unique way they were recorded and assembled, gives us confidence that you haven't heard anything comparable as of to date, even not on Mac or PC. 25 Sounds included with base App: • Orchestra Strings Spiccato & Legato 1 - 4 • Orchestra Strings Slow 1 - 3 • Chamber Arco Strings • Legato Orchestra Strings 1 • Full Sordino Strings 1 - 2 • Legato Orchestra • Staccato Orchestra 1 - 3 • Tremolo Orchestra • Pizzicato Strings • Full Strings • Tremolo Strings • All Brass 1 - 2 • Trombone Section • Cello & Woodwinds • Horns & Strings • Full Legato Orchestra 297 additional sounds available as 15 optional in-app purchase sound sets: „Pro-", „Arpa-", „Canto-", „Boato-", „Vento-", „Ottone-", „Voce-", „Varia-", „Perla-", „Aulos-", „Keys-", „Cupra-", „Organ-", „Tosca-" and „Corda Sound Set". You find a detailed sound list & demo videos on our product website. General Features: • Low latency disk streaming. • Very efficient audio engine. • Polyphony of several hundred stereo voices.² • Audio latency down to 1 ms. • Integrated effects with 18 presets. • 16 parts. • Scale Tuning & Master Tune. • MIDI velocity response curve editor. • App States: Save app's entire state as user presets. • Interactive, easy & quick sound finder. • App can keep running in the background, so you can play on your keyboard while e.g. using Safari or another app to display scores or surfing the Internet. • Hermode Tuning: Imitates the tuning behavior of well educated musicians of i.e. orchestras and choirs. • Audio Unit v3 Plugin included. • Supports Apple's "Inter-App Audio" (IAA) system. • Virtual on-screen piano keyboard with velocity support, scalable & scrollable. MIDI Player / Recorder: • Record, save and load your songs in standard MIDI file format. • Share your songs easily as audio file. • Unlimited amount of tracks. • Configurable MIDI channel per track. • Unlimited recording and playback length. • Open MIDI (.mid) files directly from other apps (i.e. from Safari, Mail). • Metronome • Use the "Tempo Zoom" dial knob to i.e. slow down playback at any time and learn your favorite songs easily. ¹ For more information about supported adapters and MIDI keyboards, please visit our product website. ² Sounds are using several voices per note. Polyphony depends on the exact device model being used. You find a polyphony table on our product website. Anti-Spy Commitment: We take your privacy very seriously. None of our apps contain so called „spy” behaviors and we committed ourself to a very high privacy standard. For more information read our „Privacy Policy for Mobile Apps”.
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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.