Privacy Policy

1. Basic Policy

The App is an instrument tool providing a tuner, reference tone, metronome, waveform display, and practice records. It does not require account registration and is not designed to collect or accumulate users' personal information.

2. Microphone (audio) handling

The App uses microphone access to detect the pitch of your instrument. Audio captured from the microphone is processed in real time on the device for pitch and level analysis. We do not transmit this audio to our servers or any third party. Analysis for the tuner and waveform display does not store audio (except when you use the recording feature described in the next section).

3. Microphone (recording) handling

The App offers a feature (part of the additional features, "PureTone Plus") to record your own playing for listen-back. Recording only occurs when you have enabled it and then run a pattern exercise, and recordings (.m4a) are stored only on your device. We do not transmit these recordings to our servers or any third party, and we do not access their contents.

Because the App uses the microphone in a configuration that prioritizes tuner accuracy, the reference tone and metronome clicks played through the speaker may be picked up by the microphone and included in a recording. If you would prefer to exclude them, please use earphones or headphones.

Recordings are erased when you delete the corresponding practice record in the App, or when you delete the App.

4. Information we do not collect

The App does not collect personal information such as your name, email address, contacts, or location, nor any tracking identifiers (such as advertising IDs) used to analyze usage. No third-party analytics or advertising SDKs are embedded.

5. On-device storage

Settings such as the reference pitch (A4) and theme are stored on your device (UserDefaults), and your lesson-note practice records and recordings are stored in the App's storage area. This information is never transmitted to us.

This data is included in your device backup (iCloud Backup or a computer backup). When you switch devices, it carries over if you set up the new device by restoring from a backup or using Quick Start. We do not provide any syncing through our servers.

6. Network communication

The App performs network communication only for the following purposes. Neither involves information that identifies you personally.

• App configuration: to check information such as the recommended version, the App fetches a configuration file from our distribution endpoint (bluemagicians.com).
• Contact: only when you use the contact form on this website, the name, email address, and message you enter are sent to us.

7. Purchase information

The App's additional features, "PureTone Plus", are offered as a one-time in-app purchase. Payment and purchase-state management are handled by Apple; we do not receive payment information such as credit card numbers. Entitlement is determined on the device.

8. Purposes of using contact information

• To respond to inquiries from users
• To investigate issues and improve quality and service

9. Provision to / outsourcing to third parties

Except as required by law, we do not provide personal information to third parties without the user's consent. However, to the extent necessary to operate this website and the contact feature, we may entrust data processing to a cloud infrastructure provider (Amazon Web Services), whose servers may be located outside Japan.

10. Children

The App is a tool to support instrument practice and is designed not to collect personal information, so that it can be used safely regardless of age.

11. Security

We take reasonable measures for the safe management of the information we handle, including preventing leakage, loss, or damage.

12. Changes to this Policy

We may revise this Policy as necessary. If we make material changes, we will announce them in the App or on this website.

13. Contact

To contact us: Provider: Blue Magicians, K.K. / Address: Shibuya Dogenzaka Tokyu Bldg. 2F-C, 1-10-8 Dogenzaka, Shibuya-ku, Tokyo 150-0043, Japan / Contact: support-puretone@bluemagicians.com