Terms of Use

1. Who We Are

The Service is operated by Developer Celyris (“Celyris,” “we,” “us,” or “our”).

For questions about these Terms, contact us at support@celyris.com.

2. Accepting These Terms

By creating an account, using the Service, downloading the app, starting a lesson, using a practice feature, or purchasing a subscription, you agree to these Terms.

If you do not agree to these Terms, do not use the Service.

If you use Celyris on behalf of an organization, church, school, family program, or other group, you represent that you have authority to accept these Terms for that organization, and “you” includes that organization.

3. Eligibility

Celyris may be used by learners of different ages. If you are legally able to agree to these Terms yourself, you may use the Service on your own.

If you are under the age of majority where you live, you may use the Service only with permission from a parent or legal guardian.

If you are under 13, a parent or legal guardian must review and accept these Terms, provide consent for your use of the Service, and supervise or manage your account and subscription activity.

4. The Service

Celyris provides worship piano learning features, including guided lessons, modules, interactive note and chord practice, play-along exercises, backing tracks, progress tracking, an on-screen piano, optional MIDI input support, app preferences, and premium content.

The Service is for learning, practice, and personal educational use. Celyris does not guarantee that you will achieve any particular musical result, pass an exam, perform at a specific level, or be able to play any song or style after using the Service.

5. Accounts and Sign-In

Some features require an account. You may sign in using email and password, Google Sign-In, or Sign in with Apple, depending on what is available on your device and platform.

You agree to provide accurate account information and keep it current. You are responsible for maintaining the confidentiality of your login credentials and for all activity under your account.

If you believe your account has been compromised, contact us at support@celyris.com and change your password if your account has one.

We may use verification codes, password reset codes, access tokens, refresh tokens, login attempt limits, and other security measures to protect accounts and the Service.

6. Account Deletion

Where available, you may delete your Celyris account from within the app or by contacting us at support@celyris.com.

Deleting your Celyris account is intended to permanently delete your account and associated owned backend records, such as lesson completion records, practice completion records, and subscription rows, subject to legal, security, billing, backup, and fraud-prevention retention needs.

Deleting your Celyris account does not automatically cancel an Apple App Store or Google Play subscription. You must cancel your subscription through the applicable store account settings if you do not want future billing.

After account deletion, you may lose access to progress, premium status in Celyris, cached account state, and other account-based features.

7. Subscriptions and Premium Features

Celyris may offer premium subscriptions that unlock paid features, such as premium lessons, premium modules, worship play-along content, backing tracks, and future premium lesson updates.

Subscription plans, prices, billing periods, renewal terms, trials, and taxes are shown in the app or in the applicable app store purchase flow before purchase. Prices and available plans may vary by country, platform, currency, promotion, or store account.

Subscriptions are billed by the platform where you purchase them, such as Apple App Store or Google Play, and may be managed through RevenueCat for subscription status reconciliation. We do not receive your full payment card number.

Unless cancelled before renewal, subscriptions may renew automatically according to the terms shown by Apple, Google, or the applicable store at the time of purchase. You are responsible for managing and cancelling your subscription through the store account used for purchase.

If you cancel a subscription, your premium access may continue until the end of the paid billing period, unless the applicable store, law, or refund decision provides otherwise. If a subscription expires, is refunded, is charged back, is paused, or has a billing issue that is not resolved, Celyris may remove premium access.

You may use the app’s restore purchase feature to ask the applicable store and RevenueCat to restore eligible purchases for your account. Restoration depends on the store account, RevenueCat status, and entitlement availability.

Refunds are handled by Apple, Google, or the applicable store according to their policies and applicable law. Celyris may be unable to issue refunds directly for purchases made through app stores.

Premium features may change over time. We may add, remove, reorganize, update, or replace lessons, practice items, audio, modules, and features. If we materially reduce a paid feature during an active subscription, we will handle the change as required by applicable law and platform rules.

8. License to Use Celyris

Subject to these Terms, Celyris grants you a limited, personal, non-exclusive, non-transferable, revocable license to access and use the Service for personal, non-commercial learning and practice.

You may not:

• Copy, sell, rent, lease, sublicense, redistribute, or commercially exploit the Service
• Download, extract, rip, share, publish, or redistribute Celyris lesson audio, backing tracks, images, text, lesson content, or other assets except through normal in-app use and caching
• Use Celyris-provided lesson audio or backing tracks for public performance, broadcast, synchronization, sampling, training datasets, resale, or commercial production without our written permission
• Modify, reverse engineer, decompile, disassemble, or attempt to derive source code from the app or Service, except where applicable law allows it
• Circumvent premium gates, signed asset URLs, authentication, security, rate limits, or other access controls
• Use automated scraping, crawling, credential stuffing, load testing, or similar tools against the Service without our written permission
• Interfere with, disrupt, damage, overload, or compromise the Service or related systems
• Use the Service for unlawful, harmful, deceptive, abusive, infringing, or fraudulent purposes
• Share your account or subscription in a way that bypasses the intended personal use of the Service

All rights not expressly granted to you are reserved by Celyris and its licensors.

9. Celyris Content and Intellectual Property

The Service, including the app, software, source design, lesson structure, text, translations, exercises, practice flows, images, icons, audio, backing tracks, sound effects, branding, and other materials, is owned by Celyris or its licensors and is protected by intellectual property and other laws.

“Celyris” and related names, logos, and marks are our trademarks or brand identifiers. You may not use them without our written permission, except as allowed by law.

Some third-party or open-source materials may be included in the app. Additional notices may appear in the app, app store listing, repository, or documentation, including the Celyris notice for piano samples derived from the University of Iowa Musical Instrument Samples database.

10. Your Content, Feedback, and Profile Information

The Service may allow you to provide information such as your name, email address, avatar from a sign-in provider, language preference, account settings, support requests, or feedback.

You retain rights you have in information you provide. You grant Celyris a worldwide, non-exclusive, royalty-free license to use, host, process, reproduce, modify, display, and transmit that information as needed to operate, secure, support, and improve the Service.

If you submit ideas, suggestions, bug reports, feature requests, or other feedback, you allow us to use that feedback without restriction or compensation to you.

You represent that you have the rights needed to provide any information or feedback you submit and that it does not violate the law or the rights of others.

11. Third-Party Services

Celyris integrates with or relies on third-party services, which may include Google Sign-In, Sign in with Apple, Apple App Store, Google Play, RevenueCat, Sentry, email providers, cloud hosting, databases, caching, CDN or asset delivery providers, and device operating system features.

Your use of third-party services may be governed by their own terms, policies, fees, account rules, and privacy practices. Celyris is not responsible for third-party services, but we use them to operate and support the Service.

12. App Store Terms

If you downloaded Celyris from the Apple App Store, Google Play, or another app store, your use of the app is also subject to the applicable store terms and rules.

For Apple App Store downloads:

• The app is licensed, not sold, to you.
• Apple is not responsible for providing maintenance or support for Celyris.
• Apple is not responsible for claims relating to Celyris or your use of Celyris, including product liability claims, legal compliance claims, consumer protection claims, or intellectual property claims, except as required by applicable law.
• Apple and its subsidiaries are third-party beneficiaries of these Terms as they relate to your use of the iOS app, and Apple may enforce those provisions against you.
• You must comply with applicable third-party terms when using Celyris.

If these Terms conflict with mandatory app store terms or applicable law, the mandatory app store terms or applicable law will control to the extent of the conflict.

13. Privacy

Our Privacy Policy explains how we collect, use, disclose, and protect information when you use Celyris.

By using the Service, you acknowledge that we process information as described in the Privacy Policy.

14. Availability, Updates, and Changes to the Service

We may update, modify, suspend, or discontinue all or part of the Service at any time. We may also impose limits on features, storage, signed asset downloads, requests, accounts, or access.

We may provide app updates to improve security, compatibility, reliability, or features. Some features may not work properly if you do not install updates.

The Service may be unavailable because of maintenance, outages, network issues, third-party service failures, app store issues, device limitations, or events outside our control.

15. Termination

You may stop using the Service at any time.

We may suspend or terminate your access to the Service if we reasonably believe that:

• You violated these Terms
• Your account is being used fraudulently or unlawfully
• Your use creates security, legal, operational, or abuse risk
• We are required to do so by law, court order, app store rule, or third-party provider requirement
• Continuing to provide the Service is no longer commercially, technically, or legally practical

If your access is terminated, these Terms will still apply to prior use, payment obligations, intellectual property rights, disclaimers, limitations of liability, indemnity, dispute terms, and any other provisions that by their nature should survive.

16. Disclaimers

To the maximum extent permitted by law, the Service is provided “as is” and “as available.” Celyris disclaims all warranties, whether express, implied, or statutory, including warranties of merchantability, fitness for a particular purpose, title, non-infringement, accuracy, availability, reliability, and uninterrupted or error-free operation.

Celyris does not warrant that:

• The Service will always be available, secure, accurate, complete, or error-free
• Lessons, practice content, audio, MIDI behavior, progress tracking, or subscription status will always be uninterrupted or perfectly synchronized
• Any defects or errors will be corrected
• The Service will meet your expectations or produce specific learning results

Some jurisdictions do not allow certain warranty exclusions, so some of these disclaimers may not apply to you.

17. Limitation of Liability

To the maximum extent permitted by law, Celyris and its owners, directors, employees, contractors, affiliates, service providers, and licensors will not be liable for indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost profits, lost revenue, lost data, lost goodwill, business interruption, device failure, or unauthorized access, even if we have been advised of the possibility of those damages.

To the maximum extent permitted by law, Celyris’s total liability for all claims relating to the Service or these Terms will be limited to the greater of:

• The amount you paid to Celyris for the Service in the 12 months before the event giving rise to the claim
• USD $50

Nothing in these Terms limits liability that cannot be limited under applicable law.

18. Indemnity

To the extent permitted by law, you agree to defend, indemnify, and hold harmless Celyris and its owners, directors, employees, contractors, affiliates, service providers, and licensors from claims, damages, losses, liabilities, costs, and expenses, including reasonable attorneys’ fees, arising from or related to:

• Your use or misuse of the Service
• Your violation of these Terms
• Your violation of law or third-party rights
• Information, content, or feedback you provide
• Your unauthorized use of another person’s account, device, payment method, or credentials

19. Governing Law and Disputes

These Terms are governed by the laws of Indonesia, without regard to conflict-of-law rules.

You and Celyris agree that disputes relating to these Terms or the Service will be brought in the competent courts of Indonesia, except where applicable law gives you a right to bring claims elsewhere.

If you are a consumer, you may have mandatory rights under the laws of your country, state, or region. Nothing in these Terms is intended to limit rights that cannot be limited by contract.

Before filing a claim, you agree to contact us at support@celyris.com and try to resolve the dispute informally. We will try to do the same.

20. Changes to These Terms

We may update these Terms from time to time. If we make material changes, we will update the “Last updated” date and provide additional notice where required by law or appropriate for the change.

Your continued use of the Service after updated Terms become effective means you accept the updated Terms. If you do not agree, you must stop using the Service.

21. Miscellaneous

These Terms, together with the Privacy Policy and any terms shown in a purchase flow, are the entire agreement between you and Celyris for the Service.

If any provision of these Terms is found unenforceable, the remaining provisions will remain in effect.

Our failure to enforce a provision is not a waiver of our right to enforce it later.

You may not assign or transfer these Terms without our consent. We may assign these Terms as part of a merger, acquisition, financing, reorganization, sale of assets, or by operation of law.

22. Contact Us

For questions, support, legal notices, or account requests, contact:

• Legal entity: Developer Celyris
• Address: Jakarta, Indonesia
• Email: support@celyris.com