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.
bismark bs-16i is a professional AUv3 SoundFont sampler for iOS and iPadOS.
$7.99 · 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 bismark bs-16i: 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 track editing features compared to desktop software.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Issues with track syncing during playback.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface can be cluttered and overwhelming.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited audio formats supported for import.
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.
bismark bs-16i is a professional AUv3 SoundFont sampler for iOS and iPadOS. Use it as a powerful plug-in instrument inside your favorite DAWs. bs-16i is powered by a synthesizer engine adopted in professional and commercial audio equipment. With the optional Hi-Res Engine, it delivers extremely clean, low-noise sound using 100% floating-point audio processing. Load SoundFont (.sf2) and DLS libraries and access a vast collection of instruments. A General MIDI–compatible setup is included by default with "GeneralUser GS SoftSynth" by S. Christian Collins. AUv3 plug-in features: • Works as an AUv3 instrument in Logic Pro, GarageBand, AUM, and other compatible hosts • Automation-ready parameters • Designed for both iPhone and iPad workflows App features: • Scalable on-screen keyboard • Pitch bend wheel and CC controllers • Built-in SMF (Standard MIDI File) player • USB and Bluetooth MIDI support Connect external MIDI keyboards, controllers, and sequencers, or drive bs-16i from other apps using Virtual MIDI. Common (AUv3 and App) features: • 16-part multitimbral playback • Full support for standard MIDI messages • SoundFont, DLS, MIDI, and Scene files are managed in the “bs-16i” folder on iCloud Drive and automatically synced across all your iOS, iPadOS, and macOS devices. iCloud Drive and local storage can be selected for each Scene. Notes: • To load SoundFont or DLS files, sufficient free memory exceeding the file size is required. • This application collects the following information: device name, OS version, SoundFont/DLS file name, and Core MIDI interface name.
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.