Support WonderDays

Happy Hack Inc.2026-08-252026-08-25

If you enjoy WonderDays, we would be delighted if you chose to support its future development and upkeep.

Support is entirely optional. There are no gifts or additional features in return, and whether or not you support us will not change the app’s features or terms of use.

How contributions are used

Contributions are used primarily to develop and maintain WonderDays, improve its content and infrastructure, and keep the service running.

Happy Hack Inc. decides how and when to use the funds. Any remaining balance may also be used for other lawful purposes, including running our other business activities. We cannot accept requests to reserve funds for a particular use, provide individual spending reports, or return any remaining balance.

To support WonderDays, enter an amount on Stripe and make a one-time payment in US dollars. There are no recurring charges.

A gift agreement is formed when payment is completed. Except where required by law, payments cannot be refunded, including those made in error or charged more than once.

Stripe will send an email receipt, but it does not certify eligibility for tax deductions for donations or other tax benefits.

The support button takes you to Stripe’s external website. Stripe’s terms apply after you leave this site.

WonderDays does not send personal information, card information, the contribution amount, installation IDs, anniversaries, or similar data to Stripe through the URL or to our API.

For questions about legal requirements, please email wonderdays@happyhack.co.jp.