Terms of Use & Acceptable Use Policy

These Terms of Use (“Terms”) constitute a binding agreement between you and Shuriko VPN governing your access to and use of the Shuriko VPN Android application (dev.shuriko.com), iOS and desktop clients, APIs, WireGuard® exit nodes, and web portal (collectively, the “Service”). By downloading, installing, creating an account, or connecting to the Service, you agree to abide by these Terms and our Privacy Policy.

Shuriko VPN provides encrypted network routing using the WireGuard® protocol and authorizes tunnel sessions using IETF RFC 9474 (RSAPBSSA-SHA384-PSS) partially blind RSA signatures. While our architecture prevents linking your account identity to your VPN exit traffic, you acknowledge that no network security tool can guarantee immunity from endpoint compromise, user-side malware, or global traffic-timing correlation.

• Registered Accounts: You may register using a valid email address and password. You are responsible for maintaining the confidentiality of your credentials.
• Guest Mode: The Android app allows temporary Guest sessions for Free Tier access. Guest sessions are bound to your local device session token; if you clear app storage or uninstall the app before upgrading your Guest session to an email account in Settings, your temporary session state cannot be recovered.
• Age Requirement: You must be at least 18 years of age (or the age of legal majority in your jurisdiction) to purchase a subscription or enter into these Terms.

To keep our Free Tier sustainable without selling user data, Free Tier usage is governed by automated cryptographic and network-level quotas:

• 6-Hour Rewarded Ad Sessions: Watching one verified rewarded video advertisement grants a blind-signed token valid for 6 hours (21,600 seconds) of VPN connectivity on designated Free Tier servers. When a session expires or enters its final 15 minutes, users may watch another rewarded advertisement to renew for a fresh 6-hour session.
• Network Integrity & Fair Capacity: Automated network-level traffic management protects shared relay capacity against excessive bandwidth abuse and ensures reliable performance for all users without inspecting or logging browsing activity.
• Anti-Abuse Nonce Verification: Attempting to forge, replay, or automate rewarded ad server-side verification (SSV) nonces will result in automatic rate limiting or account revocation.

Upgrading to Shuriko VPN Pro unlocks all global exit nodes, removes rewarded advertisements, and issues 24-hour auto-rotating blind tokens:

• Google Play Billing (Android): Android subscriptions are billed through your Google Play account at confirmation of purchase and automatically renew at the end of each billing cycle unless cancelled at least 24 hours before the renewal date.
• How to Cancel on Android: You can manage or cancel your subscription anytime in the Google Play Store app under Profile → Payments & subscriptions → Subscriptions. Deleting your Shuriko VPN account inside the app does not automatically cancel an active Google Play or Apple App Store subscription with the store—you must cancel in the store settings to stop future recurring charges.
• Refunds: Google Play subscription refunds are governed by Google Play's refund policies. If a store notifies our API of a refund or revocation, your account entitlement reverts to free and any previously minted paid blind token expires within at most 24 hours.

You agree not to misuse the Service or our WireGuard® exit infrastructure. You are strictly prohibited from using Shuriko VPN to:

• Transmit child sexual abuse material (CSAM) or content that exploits minors.
• Launch distributed denial-of-service (DDoS) attacks, port scans, brute-force intrusion attempts, botnet command-and-control traffic, or malware distribution.
• Send unsolicited bulk messages (spam), phishing campaigns, or conduct cryptographic/financial fraud.
• Scrape, attack, or reverse-engineer our control plane APIs, blind-signing endpoints, or Firebase App Check attestation mechanisms.

The Shuriko VPN name, shuriken emblem, Obsidian & Crimson interface design, and original software components are owned by Shuriko VPN and its contributors. “WireGuard” and the “WireGuard” logo are registered trademarks of Jason A. Donenfeld. Android and Google Play are trademarks of Google LLC.

THE SERVICE IS PROVIDED ON AN “AS IS” AND “AS AVAILABLE” BASIS WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR UNINTERRUPTED NETWORK THROUGHPUT. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, SHURIKO VPN SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR ANY LOSS OF DATA OR PROFITS, EXCEEDING THE TOTAL AMOUNT PAID BY YOU TO SHURIKO VPN IN THE TWELVE (12) MONTHS PRECEDING THE CLAIM.

You may terminate these Terms at any time by permanently deleting your account via the Android application or via /delete-account. These Terms shall be governed by and construed in accordance with the laws of United States, without regard to conflict-of-law principles.