Terms of Service

You must be at least sixteen (16) years old, or the minimum age of digital consent in your jurisdiction, whichever is higher. By creating an account you represent that you meet this requirement and that the information you provide is accurate.

You are responsible for safeguarding your credentials and for all activity under your account. Notify us immediately at deplazaa@gmail.com if you suspect unauthorized access.

Shadowin is an AI-assisted shadowing-based language-learning application. Core features include audio playback, voice recording for pronunciation scoring, AI-generated practice content for premium users, and progress tracking.

The Service relies on third-party AI providers (currently OpenAI) for transcription, scoring, and content generation. We do not guarantee that AI outputs are accurate, error-free, or pedagogically optimal, and you should not rely on the Service as a substitute for qualified instruction where accuracy is critical.

You agree not to:

(1) reverse-engineer, decompile, or attempt to extract source code from the Service; (2) use the Service to generate, store, or transmit content that is unlawful, infringing, defamatory, harassing, or sexually explicit involving minors; (3) attempt to bypass rate limits, quotas, authentication, or premium-tier gating; (4) use the Service to train or fine-tune competing AI/ML models; (5) resell, sublicense, or otherwise commercially redistribute access to the Service; (6) submit voice recordings of any person other than yourself without that person's informed consent.

We may suspend or terminate accounts that violate this section without prior notice.

Two payment methods, two legal arrangements. The Service offers two ways to pay, and the legal relationship for each is different. Read whichever section applies to your chosen method.

4.1 Card payments via Gumroad. When you pay by credit or debit card, the transaction is processed by Gumroad, Inc.(“Gumroad”), a Delaware-incorporated company, acting as Merchant of Record. Gumroad is responsible for transaction processing, billing receipts, customer-support escalations related to payment, and the collection and remittance of applicable sales tax / VAT / GST. Your billing relationship for card payments is with Gumroad, not with us. Gumroad's own terms apply to the payment portion of the transaction.

4.2 Crypto payments via NOWPayments. When you pay with cryptocurrency, the invoice is hosted by NOWPayments, which acts as a payment service provider only — not as Merchant of Record. The legal seller of the Service for crypto payments is Andrii Donich, registered at Malovskogo 10, Odesa, Ukraine. Crypto transactions are final once confirmed on the relevant blockchain; refunds for crypto payments are handled directly by us under the Refund Policy.

4.3 Plans and renewal. The Service is offered on a monthly or yearly basis. Recurring billing is handled by the relevant processor (Gumroad for cards). Crypto payments are one-off invoices for a fixed period; renewal requires a new invoice.

4.4 Price changes. We may change prices. Price changes apply to renewals or new invoices occurring at least thirty (30) days after we notify you by email or via a notice in the Service.

4.5 Taxes. For card payments, Gumroad calculates and adds applicable sales tax / VAT / GST at checkout based on your billing location. For crypto payments, no tax is collected at checkout; you are responsible for any tax that may apply in your jurisdiction.

4.6 Refunds. Refunds are governed by our Refund Policy, which forms part of these Terms.

For card subscriptions, you may cancel at any time via your Gumroad receipt email or by signing in to Gumroad and managing the subscription there. Crypto invoices are one-off and have nothing to cancel — they simply expire at the end of the paid period unless you purchase a new invoice. You may also email deplazaa@gmail.com and we will help. Cancellation stops future renewals; you retain access to premium features until the end of the paid period.

We may terminate or suspend your account immediately, without refund, if you breach these Terms, abuse the Service, or expose us to legal or financial risk.

You retain ownership of voice recordings, text, and other content you submit (“User Content”). You grant us a limited, non-exclusive, royalty-free license to process User Content solely to operate, improve, and provide the Service to you, including transmission to AI subprocessors strictly for the purpose of generating the response you requested.

We do not sell User Content. We do not use User Content to train models for third parties. See our Privacy Policy for retention details.

The Service, including its software, design, and pre-generated lesson library, is owned by us and protected by intellectual-property law. We grant you a limited, non-transferable, revocable license to use the Service for personal, non-commercial language learning, subject to these Terms.

The Service is provided “as is” and “as available” without warranties of any kind, express or implied, including without limitation any warranty of merchantability, fitness for a particular purpose, non-infringement, or accuracy of AI-generated content.

We do not warrant that the Service will be uninterrupted, secure, or error-free, or that any defect will be corrected.

To the maximum extent permitted by law, our total aggregate liability arising out of or related to these Terms or the Service will not exceed the greater of (a) the amounts you paid for the Service (whether to Gumroad acting as Merchant of Record for card payments or directly to us for crypto payments) in the twelve (12) months preceding the event giving rise to the claim, or (b) USD 50.

We will not be liable for any indirect, incidental, special, consequential, or punitive damages, or for lost profits, revenue, or data.

Some jurisdictions do not allow the exclusion or limitation of certain damages; in those jurisdictions, the limitations above apply only to the extent permitted by law.

You agree to indemnify and hold us harmless from any third-party claim arising from your User Content, your violation of these Terms, or your violation of applicable law.

We may update these Terms from time to time. Material changes will be communicated by email or via a prominent notice in the Service at least fifteen (15) days before they take effect. Continued use after the effective date constitutes acceptance.

These Terms are governed by the laws of Ukraine, without regard to its conflict-of-laws principles. Any dispute will be resolved exclusively in the courts of Odesa, Ukraine, except where mandatory consumer-protection law in your country of residence grants you the right to bring proceedings in your local courts.

Andrii Donich
Malovskogo 10, Odesa, Ukraine
Email: deplazaa@gmail.com