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Crankshaft Review

Crankshaft is an AI-powered music discovery platform that learns user taste from actions on-device without collecting personal data.

shipped Aug 24, 2026freemium
Crankshaft — product screenshot

Why it matters

1Learns user taste from actions like volume velocity and skip timing, not personal data.
2Operates entirely on the user's iPhone & iPad, collecting no personal data.
3Requires an Apple Music subscription for full functionality.
4Offers a free tier with full functionality, no subscription, and no trial timer.

Specs

API Available

Yes, public API

overview

What is Crankshaft?

Crankshaft is an AI-powered music discovery tool developed by Crankshaft Music that enables Apple Music subscribers to discover new music based on their taste, without collecting personal data. It learns from user actions directly on the device, providing a personalized listening experience that avoids repetitive algorithms.

features

Key Features of Crankshaft

Crankshaft incorporates several features designed to provide a private and personalized music discovery experience, leveraging on-device AI and user interaction data.

  • Music discovery based on user taste, not external data collection.
  • Learns from user actions such as volume velocity and skip timing.
  • Runs entirely on the user's iPhone & iPad, ensuring data privacy.
  • Collects no personal data, with no account or tracking.
  • Maintains a permanent ledger of user taste, preventing resets or cold starts.
  • Integrates with the user's existing Apple Music library and the broader catalog.
  • Prioritizes finding music that fits the user's taste over trending content.
  • Designed with privacy by design principles: no account, no tracking, no data leaves the device.

use cases

Who Should Use Crankshaft?

Crankshaft is designed for specific user demographics who prioritize privacy and seek an alternative to conventional music recommendation algorithms.

  • Users who desire music discovery without any form of personal data collection.
  • Individuals frustrated with repetitive music algorithms from existing streaming services.
  • People who want to expand their music taste beyond familiar songs and genres.
  • Users who prioritize privacy and on-device processing in their music applications.
  • Apple Music subscribers looking for an enhanced and personalized listening experience.

how to use

How to Use Crankshaft

To begin using Crankshaft, users must download the application from the Apple App Store and have an active Apple Music subscription. The application learns user preferences through direct interaction.

  • 1Download the Crankshaft application from the Apple App Store for iPhone or iPad.
  • 2Ensure an active Apple Music subscription is linked to the device.
  • 3Launch the Crankshaft app to begin music playback and discovery.
  • 4Interact with music by adjusting volume, skipping tracks, or listening fully to allow the AI to learn taste.
  • 5Continue using the app; its taste profile sharpens with every session and update.

pricing

Crankshaft Pricing & Plans

Crankshaft operates on a freemium model, offering its full functionality without requiring a subscription or imposing trial limitations.

  • Free: Full functionality, no subscription, no trial timer, no upsell.

Pros

  • +Ensures complete user privacy by collecting no personal data and operating entirely on-device.
  • +Provides a personalized music discovery experience based on real-time user reactions (volume, skips).
  • +Avoids the 'collapse' of repetitive music recommendations often found in other algorithms.
  • +Offers full functionality in its free tier, making it accessible without financial commitment.
  • +Integrates seamlessly with existing Apple Music subscriptions for an enhanced experience.

Cons

  • Requires an active Apple Music subscription, limiting its use for subscribers of other services.
  • Currently exclusive to iPhone & iPad (Apple iOS) platforms, excluding Android or desktop users.
  • As a first release, its taste-learning capabilities are expected to sharpen over time, implying initial refinement period.
  • Lacks direct integration with other major streaming platforms like Spotify or YouTube Music.

Similar Tools

Crankshaft vs Competitors

Crankshaft differentiates itself in the music discovery landscape through its explicit focus on privacy and on-device taste learning, contrasting with services that rely on user data or explicit feedback.

1
Skiley

Provides daily personalized playlists and can find similar tracks from any song or playlist based on audio features, genre, mood, and style.

While Skiley analyzes listening habits and preferences, it still connects to your Spotify data to understand your taste. Crankshaft explicitly states it 'reads your taste, not your data,' implying less reliance on existing listening history.

2
Chosic

Offers a suite of tools including a similar songs finder, playlist generator by mood, and a music taste analyzer, allowing discovery through various input methods.

Chosic provides a broader set of music analysis and discovery tools that you interact with directly. Crankshaft focuses more narrowly on a personalized 'taste-reading' AI experience, whereas Chosic offers more direct input and exploration options.

3
Moodify

Discovers new music specifically based on the mood of your currently playing Spotify track, using AI trained on emotional sentiment and various audio metrics.

Moodify is highly specialized in mood-based recommendations from a currently playing track, offering a more focused 'taste-reading' experience than Crankshaft's broader approach. It explicitly states it doesn't save user info, aligning with Crankshaft's 'not your data' claim.

4
Gnoosic

Learns your music taste by asking you what artists you like and dislike, building a recommendation system based on explicit feedback.

Gnoosic's method of 'reading your taste' is very direct, relying entirely on explicit user input (likes/dislikes) rather than analyzing existing data. This is a more manual but potentially more transparent way to build a taste profile compared to Crankshaft's AI.

5
Anagnorisis

A completely local, open-source AI-powered music recommendation system that puts users in control of their data and preferences, without relying on cloud services.

Anagnorisis offers the ultimate control over data privacy by being a self-hosted, local solution, directly addressing the 'not your data' aspect more profoundly than Crankshaft. However, it requires technical setup as it's a Python project for self-hosting.

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