Yesterlight

Terms of Service & End User License Agreement

Terms of Service & EULA

Effective date: July 8, 2026

1. Acceptance of Terms

By downloading, installing, or using Yesterlight ("Yesterlight," "the App," or "the Game"), provided by Adelyons Software LLC ("we," "us," or "our"), you agree to these Terms of Service and End User License Agreement (the "Terms") and to our Privacy Policy. A standalone End User License Agreement is also available and is incorporated by reference. If you do not agree, do not use the App.

2. The Game

Yesterlight is a single-player, offline, no-account time-travel puzzle game and Myst-like manor mystery. You explore the rooms of Fennick Hall through four eras using a chronoscope era slider, and changes you make in the past ripple forward through later eras. It is a wistful, non-violent mystery — atmospheric rather than a horror game — provided for entertainment. The Game runs entirely on your device; as described in our Privacy Policy, there is no account and no cloud backend, and your save is stored only on your device.

3. License Grant

Subject to these Terms, Adelyons Software LLC grants you a personal, limited, non-exclusive, non-transferable, revocable license to download and use one copy of the App on a device that you own or control, solely for your personal, non-commercial use. This license does not transfer any ownership rights. All rights not expressly granted are reserved. See the standalone EULA for the full license terms.

4. Subscriptions & Billing (Yesterlight Pro)

5. Your Save & Data

Because Yesterlight is local-first, your progress — your event log, inventory, recovered journal pages, and settings — is stored only on your device; we do not receive, store, or claim any license to it. You are responsible for keeping your own device backups if you wish to preserve your save. See the Privacy Policy for full details.

6. Acceptable Use

You agree not to:

7. Intellectual Property

The App, its design, story, artwork, and software are owned by Adelyons Software LLC and are protected by intellectual property laws. These Terms grant you a personal, non-transferable, revocable license to use the App; they do not transfer any ownership rights.

8. Apple App Store — Additional Terms

If you download the App from the Apple App Store, the following additional terms apply, and you acknowledge and agree that:

9. Disclaimers & No Warranty

The App is provided "as is" and "as available," without warranties of any kind, express or implied, including the warranties of merchantability, fitness for a particular purpose, and non-infringement, to the fullest extent permitted by law. We do not warrant that the App will be uninterrupted or error-free.

10. Limitation of Liability

To the maximum extent permitted by law, Adelyons Software LLC shall not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of data, loss of a save, or loss of profits, arising from or related to your use of (or inability to use) the App, even if advised of the possibility of such damages. Our total liability for any claim related to the App shall not exceed the amount you paid us for the App in the twelve months preceding the claim.

11. Termination

You may stop using the App at any time by deleting it from your device, which also removes the data stored locally. We may suspend or terminate this license if you violate these Terms. These Terms continue to apply to your prior use.

12. Changes to These Terms

We may update these Terms from time to time. Material changes will be reflected by updating the "Effective date" above and, where appropriate, through an in-app notice. Continued use of the App after changes take effect constitutes acceptance of the updated Terms.

13. Governing Law

These Terms are governed by the laws of the State of Iowa, United States, without regard to its conflict-of-law principles. You agree that any dispute not subject to the rules of the applicable app store will be resolved in the state or federal courts located in Iowa, to the extent permitted by law.

14. Contact

Questions about these Terms? Email dev@adelyons.com.

Adelyons Software LLC
https://adelyons.com