Terms of Use

Last updated: July 2026

1. About these terms

These terms govern your use of "Otolog" (the "App"), provided by freetokyo (the "developer"). By downloading or using the App, you agree to these terms.

2. In-app purchase (one-time)

The App is free to use, and the free tier covers up to 3 students and 1 custom method book. Purchasing "Otolog Pro" makes students and custom method books unlimited and unlocks the PDF progress report and the Home Screen widget.
Otolog Pro is a one-time, non-consumable in-app purchase — not a subscription. There is no auto-renewal and no recurring billing. The price is ¥2,000 (Japan App Store). Purchase and payment are handled by Apple.
After changing devices or reinstalling, restore it from Settings > Restore Purchase (the same Apple Account used for the purchase is required).

3. Your data

Data you enter is stored only on your device. See the Privacy Policy for details.

4. Backup and data loss

The App has no server and no cloud sync, so your data is lost if the device is lost, damaged, or erased, or if the App is deleted. Export a file regularly from Settings > Encrypted Backup and keep it yourself. If you lose the backup password, no one — including the developer — can restore it. The developer is not responsible for data loss.

5. Your responsibility

The App handles personal information about students and their guardians. Complying with the laws that apply to collecting and handling that information is your responsibility. Storing data on your device by design does not exempt you from those obligations. This page is general information, not legal advice.

6. About method books

The preset method books exist solely to track progress by piece number; they contain no sheet music or song title data. Titles are shown for identification only and do not imply any affiliation with or endorsement by their publishers.

7. Disclaimer

The App is provided as is. To the extent permitted by applicable law, the developer is not liable for damages arising from the use of, or inability to use, the App.

8. Changes

If these terms change, this page will be updated.

9. Contact

freetokyo2020@yahoo.co.jp (Developer: freetokyo)