Privacy Policy

Last updated: 12 June 2026

IMPSY is an AUv3 MIDI Processor plugin for iOS, iPadOS and macOS. It is designed to be played, not to collect data about you. This page explains what IMPSY does — and does not do — with your information.

On-device. No network. No telemetry.

What we collect

Nothing. IMPSY has no user accounts, no analytics, no advertising and no tracking. The app does not collect, store or transmit any personal information about you or your device to the developer or to any third party.

How the app uses your device

IMPSY runs entirely on your device. The neural-network inference happens locally via Apple's audio extension sandbox and the TensorFlow Lite runtime bundled with the plugin. The MIDI you play, and the MIDI IMPSY produces in response, stay on the device throughout.

The plugin stores your settings (loaded model, MIDI mappings, parameter values, MIDI Thru state) in the AUv3 host's session state — the same state your DAW saves when you save a project. That state lives wherever your DAW puts it (typically inside the project file on your device or in your iCloud Drive if you have iCloud sync on).

What about the model file?

If you load a custom .tflite model via the Load Model button, IMPSY stores a security-scoped reference to that file so it can reopen it the next time your session loads. The file itself stays where you put it; IMPSY does not upload or share it.

Session logs

IMPSY can optionally record your playing. If you switch on Record Session Logs in the Settings screen, the MIDI you and the model play is written to .log files (in the format used by the IMPSY Python toolkit, so they can be used to train new models) in a folder you choose. Logging is off by default. The log files stay in that folder on your device — IMPSY never uploads or shares them, and you can delete them at any time.

Network access

The plugin does not make any network calls. It does not phone home, check for updates, fetch ads, send crash reports, or sync data to a server. If your device is offline, IMPSY behaves identically to when it is online.

Permissions the app may request

IMPSY does not request access to your contacts, photos, location, camera or microphone. The only system prompts you might see are the standard file and folder pickers: choosing a .tflite model with Load Model…, importing or exporting a TOML configuration, or picking the folder for session logs — and, on macOS, the system may ask permission for a folder (such as Documents) the first time you choose a file there.

Crash reports

If you have Apple's Share with App Developers setting enabled in your device's Privacy & Security settings, Apple may forward anonymised crash reports to the developer through App Store Connect. You can opt out at any time in your device settings. The developer receives no other diagnostic information.

Children

IMPSY is suitable for all ages and does not collect any information from anyone, including children.

Changes to this policy

If this policy changes, the updated version will be posted on this page with a new "last updated" date.

Contact

If you have questions about this policy, please contact Charles Martin via charlesmartin.au, by email at [email protected], or open an issue on the IMPSY-AUv3 GitHub repository.