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)
- Free & Yesterlight Pro: The entire East Wing — around an hour of play, all four eras, the full era-slider mechanic, and its journal page — is free, and no payment card is required to start. Yesterlight Pro unlocks the two remaining wings, the grounds, the finale, and the concrete-hint tier. Plans currently include: a Monthly subscription at $3.99/month; an Annual subscription at $19.99/year (recommended, with a 7-day free trial); and a one-time Lifetime purchase at $39.99. All three unlock the same Yesterlight Pro content. Prices may vary by region and are shown in the App at the time of purchase.
- Store-managed billing: Subscriptions and the lifetime purchase are billed through your Apple App Store or Google Play account, using their in-app billing, and are managed through that account. We never see or store your payment-card details.
- The East Wing stays free: The free chapter is not time-limited and is not part of Yesterlight Pro.
- Free trial: A clearly-disclosed 7-day free trial is offered on the Annual plan only, and is cancel-anytime. Unless you cancel before the trial ends, the Annual subscription begins and is charged at the then-current price. The Monthly plan and Lifetime purchase do not include a trial.
- Auto-renewal: The Monthly and Annual subscriptions renew automatically for the same period at the then-current price unless you cancel at least 24 hours before the end of the current period. The Lifetime option is a one-time, non-renewing purchase.
- Cancellation: You can manage or cancel a subscription at any time in your device's subscription settings (Apple App Store or Google Play). Cancellation takes effect at the end of the current billing period.
- Refunds: Refund requests are handled by Apple or Google according to their respective policies.
- Changes: We may change pricing or the content included in Yesterlight Pro with notice; changes apply at your next renewal.
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:
- Reverse-engineer, decompile, or tamper with the App, except to the extent permitted by law;
- Use the App in any unlawful way or to infringe the rights of others;
- Circumvent, disable, or interfere with the App's purchase or licensing mechanisms.
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:
- These Terms are between you and Adelyons Software LLC only, and not with Apple Inc. ("Apple"). Apple is not responsible for the App or its content.
- The license granted is limited to a non-transferable license to use the App on any Apple-branded device that you own or control, as permitted by the Usage Rules in Apple's Media Services Terms and Conditions. To the extent these Terms conflict with Apple's standard Licensed Application End User License Agreement (EULA), the Apple Licensed Application EULA governs for App Store downloads.
- Apple has no obligation to provide maintenance or support for the App. Any questions or support requests should be directed to us at dev@adelyons.com.
- If the App fails to conform to any applicable warranty, you may notify Apple, and Apple may refund the purchase price (if any); to the maximum extent permitted by law, Apple has no other warranty obligation with respect to the App.
- Apple is not responsible for addressing any claims by you or a third party relating to the App, including product-liability, regulatory, or intellectual-property claims.
- Apple and Apple's subsidiaries are third-party beneficiaries of these Terms, and upon your acceptance, Apple has the right (and is deemed to have accepted the right) to enforce these Terms against you as a third-party beneficiary.
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