Overview

Yesterlight ("Yesterlight," "the App," or "the Game") is developed by Adelyons Software LLC ("we," "us," or "our"). Yesterlight is a private, local-first, no-account time-travel puzzle game and manor mystery. This policy explains how the App handles your information. The short answer: it doesn't leave your phone.

Information Stored On Your Device

The following is created and stored locally on your device only, in the App's private storage. It is not transmitted to us or to any server:

• Game save: Your forward-only event log, current room and slider position, inventory, and any era-stranded items.
• Progress: Which wing journal pages you have recovered and other in-game progress.
• App settings & preferences: Your in-app preferences.

Because this data lives only on your device, it is removed when you start a new game (which clears the save), clear the App's data, or uninstall the App.

No Account, No Cloud, No Server

• Yesterlight does not require you to create an account, sign in, or provide an email address, phone number, name, or any other identifier. There is no contacts grab.
• We do not operate a server that receives, stores, or backs up your data. There is no backend anywhere in the App.
• Your save is not synced between devices by us. If your device's operating system backs up app data (for example through iCloud or Android backup that you have enabled), that backup is controlled by you and your platform provider under their policies — not by us.
• The Game is fully playable offline; it needs no network connection to run.

Hints Are Deterministic & On-Device — No AI Model

Yesterlight's owner's-marginalia hint system is produced by deterministic, rule-based logic that runs entirely on your device. It inspects your local event log for near-misses and selects a written response. There is no language model, no AI model, and no model download anywhere in the App, and it requires no network connection and no API key. Nothing about your gameplay is sent anywhere.

Optional Purchases (Yesterlight Pro)

Yesterlight's East Wing is free, with an optional Yesterlight Pro upgrade. Purchases are the only feature that involves any data leaving your device, and they are handled by trusted providers:

• Apple App Store / Google Play: When you subscribe or make the lifetime purchase, the transaction is processed entirely by Apple or Google under their own privacy policies. We never receive or store your payment-card details.
• RevenueCat: We use RevenueCat to validate and restore your Yesterlight Pro entitlement. RevenueCat receives a purchase token, an anonymous app-generated user identifier, and basic device and purchase metadata needed to deliver and restore your purchase. It does not receive any of your gameplay. See RevenueCat's privacy policy.

If you never make a purchase, no purchase-related data is sent. Subscription terms (including the 7-day annual trial and auto-renewal) are described in our Terms of Service and EULA, and are also governed by Apple's Media Services Terms and Google Play's Terms of Service.

What We Do NOT Collect

• We do not collect, upload, or store your gameplay or any of your data on any server.
• We do not require an account, email address, phone number, name, or login, and we do not request access to your contacts.
• We do not collect location data.
• We do not use advertising identifiers or any cross-app tracking, and we do not show ads.
• We do not use third-party analytics or crash-reporting SDKs in the App that send your usage or personal data to us.
• We do not sell or rent your personal information to anyone. There is nothing for us to sell — your data stays on your phone.

Data Retention & Deletion

Because your save, progress, and settings are stored only on your device, you control them directly and they are kept for as long as you keep them:

• Reset in-app: Starting a new game clears your existing save, and you can clear the App's data from your device settings.
• Uninstall: Deleting the App from your device permanently removes all of its locally stored data. Because there is no server, there is no server-side copy to delete and no account to close — which is also why there is no "delete account" page.
• Purchase records: Subscription and purchase records held by Apple, Google, or RevenueCat are retained under their respective policies. You can manage or cancel a subscription from your device's store settings.

Security

Your save stays within the App's private storage on your device, protected by your device's operating system. Communication with the App Store, Google Play, and RevenueCat for purchase handling uses encrypted (TLS) connections. No system can guarantee absolute security, but keeping your data on-device means there is no central database of your gameplay to breach.

Children's Privacy

Yesterlight is intended for a general audience and is not directed to children, and it does not request that children provide information to us. Because everything is local and there is no server, we do not knowingly collect personal information from anyone — there is nowhere for such data to be sent to us. If you believe information somehow reached us (which our architecture is designed to prevent), contact us using the details below and we will help.

Your Rights

Privacy laws such as the GDPR (EU/EEA/UK) and CCPA/CPRA (California) give you rights to access, correct, delete, and port your personal data, and to opt out of its sale. Because Yesterlight does not collect or store your personal data on our servers, we hold nothing about you to disclose, correct, or sell. You can exercise full control over your in-app data using the reset and uninstall options above. For any purchase data held by Apple, Google, or RevenueCat, contact those providers or reach us using the details below and we will help.

Changes to This Policy

We may update this policy as the App evolves. 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 policy.

Contact Us

Questions about this policy or your data? Email dev@adelyons.com.

Adelyons Software LLC
https://adelyons.com