Terms & Conditions

1. Acceptance

These Terms govern your use of the Booktail mobile application (the "App") and the related cloud sync service (together, the "Service") provided by Khatsiur Vasyl, a sole proprietor (ФОП) registered in Ukraine ("we", "us", "our"). By creating an account, using the App, or purchasing a subscription you agree to these Terms.

If you do not agree, do not use the Service.

2. Definitions

• Service — the App, our cloud backend, and the synchronisation features that connect them.
• User Content — everything you create in the App: books, shelves, journeys, sessions, history, notes, attachments, goals, and settings.
• Account — the personal account you create by signing in.
• Premium — the paid tier of access to the Service described in Section 7.
• Platform — the Apple App Store or Google Play, through which you install the App and purchase a subscription.

3. Account and Sign-in

To use the full Service, you sign in using a third-party identity provider (Sign in with Apple or Sign in with Google). You agree to:

• Provide accurate information when prompted;
• Keep secure your access to the third-party account you signed in with;
• Use one account per person.

We may refuse to create, suspend, or terminate an account if we reasonably believe it is being used to violate these Terms, the law, or the rights of others. Where feasible we will notify you before doing so.

4. Acceptable Use

You agree not to:

• Upload, store, or transmit content that is illegal, infringes others' rights, or constitutes child sexual abuse material;
• Reverse-engineer, decompile, or attempt to extract the source code of the App;
• Scrape, automate, or otherwise abuse our backend beyond ordinary personal use;
• Share your credentials or access tokens with third-party applications or services, or authorise any third party to access the Service or extract your User Content from it by automated means on your behalf. This restriction does not affect your right to export your own User Content yourself through the official means we provide (see Section 13 and the data-portability right in our Privacy Policy);
• Create multiple accounts to circumvent limits, deletion grace periods, or pricing rules;
• Circumvent technical restrictions on paid features, including by using forged, altered, or another person's purchase receipts, modified builds of the App, or any other means of obtaining access to Premium without payment;
• Use the Service to aggregate other users' reading data for commercial purposes;
• Attempt to bypass authentication or access another user's data.

5. Your Content and Our Intellectual Property

Your User Content remains yours.

You retain all rights in your User Content. We do not claim ownership over your books, notes, attachments, or reading data.

We do not use your User Content to train machine-learning or artificial-intelligence models, for marketing, or for sale to third parties.

Limited licence you grant us.

You grant us a worldwide, non-exclusive, royalty-free licence to host, store, transmit, and display your User Content solely to provide the Service to you (sync across your devices, backup, display). This licence ends when you delete your account, subject to the deletion timing described in our Privacy Policy.

Our intellectual property.

The App, the "Booktail" name, our logos, designs, and source code are our intellectual property. You may not copy, modify, decompile, or create derivative works of them, except as expressly permitted by mandatory law.

6. Catalog and Third-Party Book Data

Book metadata in our catalog may originate from third-party book-data providers. We do not warrant the accuracy, completeness, or currency of catalog metadata. If you find an error, please tell us so we can improve it.

7. Booktail Premium

7.1 What Premium Includes

Booktail Premium is a paid tier of access to additional appearance-personalisation features and extended reading statistics.

The current list of features included in Premium is shown in the App on the subscription screen before purchase. We may change that list in accordance with Section 7.8.

7.2 Plans and Pricing

Premium is offered as an auto-renewing subscription, monthly or annual.

The price is set for your country, currency, and applicable tax law, and may differ between countries. The current price, the length of the billing period, and other terms are shown on the subscription screen before you confirm the purchase.

We may change the price of Premium. A new price applies from the next billing period. Notice of a price change and, where the Platform's rules require it, obtaining your consent are handled by the relevant Platform.

We do not offer a free trial of our own. A trial period or introductory price may be offered by the Platform under its own rules; in that case its terms are shown on the subscription screen.

7.3 Payment and Seller

Payment is made exclusively through the Platform from which the App was installed. The relevant Platform acts as the seller for that transaction.

We are not a payment intermediary, we do not process payments, and we have no access to your payment details — card number, bank details, or billing address. We receive only information about the state of your access to Premium; what exactly we receive is described in our Privacy Policy.

7.4 Automatic Renewal

The subscription renews automatically at the end of each paid period until you cancel it. The Platform charges the payment method linked to your account with it within 24 hours before the end of the current period.

7.5 Cancellation

You can cancel your subscription at any time in your account settings on the relevant Platform. Up-to-date instructions are provided by the Platform itself:

• App Store — support.apple.com/HT202039
• Google Play — support.google.com/googleplay/answer/7018481

To avoid being charged for the next period, cancellation must be made no later than 24 hours before the end of the current period. Access to Premium continues until the end of the period you have already paid for; no refund is issued for the current period on cancellation.

7.6 Refunds

Refunds are handled exclusively by the Platform under its own rules. We do not issue refunds and have no technical ability to influence how such a request is decided.

• App Store — reportaproblem.apple.com
• Google Play — support.google.com/googleplay/answer/2479637

If you are a consumer in the EU, EEA, or the UK, mandatory consumer-protection rights of your country of residence apply and are exercised through the Platform you purchased the subscription from.

7.7 Restoring Purchases and Account Linking

Premium is linked to the Apple ID or Google account used to make the purchase, and to your Booktail account. The subscription is intended for personal use by one person.

If you have reinstalled the App or changed device, use restore purchases on the subscription screen while signed in with the same Apple ID or Google account. If you sign in to Booktail with a different account, Premium may not appear until you return to the account the purchase is associated with.

7.8 Changes to Premium and End of Access

We may add features to Premium, and may change or discontinue individual features. If a change materially reduces the scope of Premium, we will notify you in accordance with Section 14.

When a subscription ends or is cancelled, access to Premium features stops. Premium appearance elements you have applied are replaced with ones available free of charge, and premium statistics sections become unavailable to view. Some appearance settings are restored automatically together with a renewed subscription; others will need to be selected again.

Your User Content is not deleted and remains fully available regardless of subscription status.

8. Termination

By you. You may delete your account at any time via Settings → Delete Account. Your data will be retained for 30 days as described in our Privacy Policy and then permanently deleted.

By us. We may suspend or terminate your account if you materially breach these Terms (in particular Section 4 — Acceptable Use). We will give notice when feasible and provide you a reasonable opportunity to export your data before final deletion.

Subscriptions. Termination of an account — by you or by us — does not cancel a subscription with the App Store or Google Play and is not in itself a ground for a refund. Cancel the subscription separately in accordance with Section 7.5.

The following sections survive termination: 5 (intellectual property), 11 (disclaimers), 12 (limited liability), 16 (governing law).

9. Service Availability and Updates

We use reasonable efforts to keep the Service available, but we do not provide a service-level agreement. The Service may be unavailable due to maintenance, technical issues, or factors outside our control.

You agree to download and install App updates when prompted; older versions may stop working.

If we decide to discontinue the Service, we will use reasonable efforts to give you advance notice and to allow time for you to request an export of your data before it is deleted.

10. Internet Connection and Data Charges

Many features require an internet connection. You are responsible for any costs your mobile carrier charges for data, including roaming charges if you use the Service outside your home country.

11. Disclaimers

If you are a consumer in the EU, EEA, or the UK, mandatory consumer-protection rights of your country of residence apply and are not affected by this clause.

12. Limited Liability

To the maximum extent permitted by law, we are not liable for indirect, consequential, incidental, special, or exemplary damages, or for lost profits, lost data, or business interruption arising from your use of the Service.

If you are a consumer in the EU, EEA, or the UK, this clause does not limit our liability for gross negligence, wilful misconduct, death or personal injury, or any liability that cannot be limited under mandatory consumer law.

13. Backup Responsibility

Although we sync your data to our backend, sync is not a guaranteed backup. We cannot promise that a recoverable copy of your data will be available at any given moment. If you wish to keep a copy of your data outside the Service, you can request an export by email at [email protected] at any time.

14. Changes to These Terms

We may update these Terms from time to time. The Effective Date at the top reflects the most recent version. We encourage you to review the Terms periodically.

If we make a material change to these Terms, we will use reasonable efforts to bring it to your attention before it takes effect. Continued use of the Service after the effective date of any change means you accept the updated Terms; if you do not agree, you may delete your account.

15. Privacy

Your use of the Service is also subject to our Privacy Policy, which forms part of these Terms.

16. Governing Law and Disputes

These Terms are governed by the laws of Ukraine.

Any dispute arising from these Terms or the Service will first be addressed by good-faith negotiation by emailing [email protected]. If not resolved within 30 days, disputes are subject to the courts of Ukraine.

If you are a consumer residing in the EU, EEA, or the UK, you may also bring claims in the courts of your country of residence under your local mandatory consumer law. EU consumers may also use the European Online Dispute Resolution platform: https://ec.europa.eu/consumers/odr.

17. General

Severability. If any clause of these Terms is held invalid, the remainder stays in full effect.

Entire agreement. These Terms together with the Privacy Policy constitute the entire agreement between you and us about the Service.

No waiver. Failure to enforce a clause is not a waiver of our right to enforce it later.

18. Contact

Khatsiur Vasyl, sole proprietor (ФОП) registered in Ukraine.
Email: [email protected]