App Overview

MusiKraken icon

MusiKraken

Snarp · Music

MusiKraken is a modular MIDI Controller Construction Kit, empowering you to fully harness the capabilities of your mobile device's hardware.

$9.99 · In-app purchases

PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
24 ratings · Top 5%

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.

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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

Screen plan

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.

Differentiate and validate

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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Free quick prompt For a smaller starting point

Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for MusiKraken: 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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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

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

Enhanced offline mode with better download management.

Assumption to check: Limited offline capabilities

Validate with people who use this workflow before building.

Hypothesis 2

Implement faster search algorithms and caching.

Assumption to check: Search functionality can be slow

Validate with people who use this workflow before building.

Hypothesis 3

Simplify UI elements and enhance visual hierarchy.

Assumption to check: User interface can feel cluttered

Validate with people who use this workflow before building.

Hypothesis 4

Integrate social sharing options for playlists and songs.

Assumption to check: Lack of social sharing features

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

MusiKraken is a modular MIDI Controller Construction Kit, empowering you to fully harness the capabilities of your mobile device's hardware. Winner of a 2022 MIDI Innovation Award! Make music using device sensors like Touch, Motion Sensors, Camera (face, hand, body and color tracking, including TrueDepth and LiDAR support) and Microphone, or connected devices like Game Controllers, Apple Watch or AirPods. Choose from several types of modules in the editor and connect the ports to create your own personal MIDI controller setup. Route the MIDI signals through effect modules to control multiple instruments simultaneously or invent creative new MIDI controller combinations. MusiKraken supports sending and receiving MIDI data over Wi-Fi, Bluetooth or via Core MIDI (for example by using Inter-Device Audio and MIDI (IDAM)). And it can host Audio Unit (AUv3) instrument plugins. Or send the sensor data via OSC. MusiKraken is also one of the first apps to officially support MIDI 2.0! You already own a very powerful device with all kinds of sensors and connection possibilities. With this app you can use these sensors as inputs, combine them with all kinds of MIDI effects and send the resulting MIDI events to your computer, synthesizer, any other MIDI-capable app or Audio Unit to to create your own, expressive MIDI controller setup. Your device for example has a multitouch screen. Use this with the Keyboard module to slide on the keys to control multiple musical parameters simultaneously. Using MPE, MIDI 2.0 or the Chord Splitter also allows you to control these parameters separately per key. Newer devices also support tracking the finger radius (or pressure on older devices), which adds another dimension of control. Multitouch is also used by the Chords Pad to play the chords of a selected scale, or the Touchpad, which allows you control values via touch gestures. Another unique input sensor is the camera: MusiKraken supports tracking your hands in front of the camera, your body pose, your face or objects with specific colors. This way you can for example use your iOS device as a Theremin, jump or dance around in front of the camera to generate notes or control audio parameters, use your mouth to control the sound of a virtual trumpet, or any other combination. If your device has a TrueDepth or LiDAR sensor, you can also use the distances as input values. Your device also has motion sensors: Accelerometer, Gyroscope and Magnetometer. They can be either used separately, or combined to get the current rotation of the device in three dimensions. Use this to generate sounds or control parameters while shaking or tilting your device. Your device also has a microphone, and MusiKraken can detect the pitch or amplitude of the signal. Your iOS device also allows you to connect to external devices. MusiKraken for example supports Game Controllers (trigger events on button or thumbstick changes, motion sensors, haptics and light on supported Game Controllers), Apple Watch (motion sensors, digital crown, touch, heart rate) or the motion sensors within AirPods. The real power comes once you start combining the sensors with the effect modules. There are effects that can be used to change or filter the MIDI events. Some effects allow you to combine multiple input sources into new output values. Or splits chords into separate notes so that they can be sent to different channels. Important: Please note that some of the modules only work on iOS devices with specific hardware: ARKit Face Tracking and the TrueDepth module need a TrueDepth front camera, and Hand and Body Pose Tracking needs at least iOS 14, and might be too slow on older devices. HealthKit is used in the app to access Apple Watch data like heart beat or motion sensors. The app only uses sensor data to generate MIDI events.

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Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
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Zustand
BUILD KIT DIFFICULTY
Advanced

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.