Terms of Use
These Terms of Use (the "Terms") set out the conditions for using Waku TODO — listed on the App Store as 湧くTODO — (the "App"), provided by Yuya Sato (the "Developer"). By using the App, you agree to these Terms.
The license to use the App is governed by Apple's Licensed Application End User License Agreement (the "Standard EULA"). These Terms supplement it. If anything in these Terms conflicts with the Standard EULA, the Standard EULA prevails.
1. What the App does
The App is a free to-do app. For every to-do you leave past its due date, a roach shows up in your "Room"; clear the to-dos and the roaches go away.
The App lets you:
- add, edit, complete, un-complete, and delete to-dos;
- set a due date, priority, star, note, and repeat (daily / weekly / monthly);
- filter by overdue or completed;
- see a room whose state reflects how many to-dos are overdue;
- open Settings (rate the app, read these Terms and the Privacy Policy, contact the Developer, delete your data).
The App has no accounts, no sign-in, no cloud sync, no contact with other users, no ads, and no purchases.
2. Price
The App is free. There are no in-app purchases, no subscriptions, and no ads.
Because there is nothing to buy, there is no refund process. Payments made through the App Store are generally handled by Apple, and the Developer cannot process them on your behalf.
3. Requirements
The App requires a supported iPhone. It does not support iPad. Depending on your device, OS version, or settings, it may not work correctly.
4. Your data and the risk of losing it
Your to-dos and your room are stored only on your device. They are not stored on the Developer's servers, and the Developer cannot see them.
As a result, if your data is lost because your device breaks, is lost or reset, because you delete the App, or because of a fault in the OS or the App, the Developer cannot recover it.
If you have device backups turned on (such as iCloud Backup), the App's data may be included in those backups. That is a function of the OS, and the Developer cannot see the contents of your backups.
For anything important, please keep a record somewhere other than the App as well.
5. The App does not remind you
The App has no push notifications and no alarms. It will never alert you that a due date is approaching or has passed. Overdue items appear on screen only when you open the App yourself.
Please do not rely on the App alone for anything where forgetting has serious consequences, such as work deadlines, payments, medication, or utility bills.
6. About the room and the roaches
The roaches shown in the App's "Room" are fictional illustrations displayed according to how many to-dos are overdue. They do not indicate any real infestation, and they are not advice about hygiene or pest control.
The App is a playful device for motivation. It does not provide medical, health, psychological, legal, tax, or other professional advice.
7. What you may not do
When using the App, you may not:
- break the law or public order;
- infringe the rights of the Developer or any third party;
- decompile, reverse engineer, or otherwise analyze the App;
- copy, modify, redistribute, or sell the App;
- interfere with the operation of the App.
8. Intellectual property
Rights in the App's program, design, illustrations, text, icons, and name belong to the Developer or the respective rights holders.
Rights in what you enter into the App — your to-do titles, notes, and other content — belong to you. The Developer claims no rights in them. Because that content is stored only on your device, the Developer neither obtains nor views it.
9. Disclaimer
The App is provided as is. The Developer does not warrant that the App is free of defects, that it is fit for any particular purpose, or that it will always be available.
To the fullest extent permitted by law, the Developer is not liable for damages arising from your use of, or inability to use, the App. This limitation does not apply to damages caused by the Developer's intent or gross negligence.
If any provision of these Terms is held invalid or partly invalid under the Consumer Contract Act of Japan or any other mandatory law, the remaining provisions remain in effect.
10. Changes to, and end of, the App
The Developer may change the App, or suspend or discontinue it. If the App is to be discontinued, the Developer will make reasonable efforts to give advance notice, for example through the store listing.
11. About Apple
These Terms are an agreement between you and the Developer. Apple is not a party to them.
The Developer, not Apple, is responsible for the App. Apple has no obligation to furnish maintenance or support for the App and is not responsible for its provision or content.
Your use of the App is also subject to the App Store and Apple Media Services terms.
Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.
12. Changes to the Terms; governing law
The Developer may update these Terms as needed. Updated Terms take effect once they are shown in the App or on the public pages.
These Terms are governed by the laws of Japan. This does not deprive you, as a consumer, of the protection afforded to you by the mandatory law of your country of residence.
Contact
If you have questions about these Terms, please write to:
Yuya Sato
Effective date: August 1, 2026
Last updated: August 1, 2026