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.
iziCast is a versatile audio and video broadcaster
$12.99 · 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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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 iziCast: 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 audio source integration
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No offline mode for certain content
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited social sharing features
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.
iziCast is a versatile audio and video broadcaster. You can broadcast audio from the internal microphone, external audio devices, audio files and Audiobus compatible apps to Icecast, Shoutcast and RTMP servers. Live video from your camera can be broadcasted to any RTMP compatible service, such as YouTube, Twitch, Facebook and Telegram. Any of the supported audio sources listed above can be combined with your live camera. When using RTMP you can decide if you want to use one of your device cameras as video source or simply an image. In case of an image it is up to you if you want to stream a single image, the album cover of the current track or just a black image to save bandwidth. The image can be changed during the broadcast and you can even let iziCast write text like the current song on the image. Besides that, iziCast comes with a lot more features. Have a look at the list below to find out what else iziCast can do. If you have any questions or suggestions feel free to contact me at [email protected] The following features are included in iziCast: • Supports internal microphones • Supports external multi channel audio devices • Supports video streaming from your device camera • Supports audio files • Sound Board with up to 16 sound pads • Supports Icecast 2 and Shoutcast 1 & 2 (legacy mode) • Supports Liquidsoap based internet radio platforms (e.g. Airtime/Azuracast) • Supports RTMP/RTMPS (YouTube, Twitch, Facebook, Telegram, etc.) • Supports Audiobus • Supports audio recording • Supports Push To Talk • Preview and share your audio recordings • Provides multiple effects via In-App Purchase (10-Band EQ, Delay, Reverb, Limiter) • Supports MP3 (bit rates from 8 kbps to 320 kbps) • Supports AAC (bit rates from 96 kbps to 320 kbps) • Supports AAC+/AAC-HE (bit rates from 24 bps to 80 kbps) • Supports OGG/Vorbis (bit rates from 16 kbps to 320 kbps) • Supports FLAC (Free Lossless Audio Codec) • Shows you the input audio volume on its level meter • Shows you the used traffic and file size of a session (tap the dot matrix text) • Shows you the number of current and peak listeners • Automatically reconnects on connection failures • Allows you to update the song information • Allows you to apply gain to the input volume • Allows you to mix multiple audio sources with individual volumes • Supports monitoring Which external audio devices are supported? Basically, every class-compliant audio device is supported. Manufacturers will usually indicate whether a device is class-compliant or not. If you cannot find information about class compliance, a good rule of thumb is that an audio device is class-compliant if it does not need a driver to work on macOS. So, if your device works on macOS without a driver, it will also work on your iPhone or iPad with iziCast. List of successfully tested external audio devices: (There is a very high chance that your device will work with iziCast even if it is not listed here) • 1010music Bluebox • Alesis MultiMux 12 USB (Please set the preferred input sample rate to 44100 Hz) • Apogee jam+ • Apple AirPods (Pro) • Apple EarPods • Behringer U-Control UCA202 / UCA222 • Behringer Xenyx 302 USB • Behringer U-Phoria UMC404HD • Elektron Digitakt • Elektron Syntakt • Evermix MixBox • Focusrite Scarlett 4i4 • M-audio Fast Track Ultra Pro • Pyle PAD30MXUBT • Roland go:mixer • Tascam iM2X • Tascam iXJ2 • Tascam US-1800 • Traktor Z1 • Yamaha SC2 Silent Piano • Zoom F1 • Zoom H2 Recorder (Please set the sample rate on the device to 48 kHz) • Zoom H3-VR • Zoom H4n Pro • Zoom H6
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.