Terms of Service

Thank you for using Akuma SRS! Please read these Terms of Service ("Terms") carefully before downloading or using the Akuma SRS mobile application (the "App") or the https://akumasrs.io website (together with the App, the "Service"). These Terms are a binding agreement between you and Oguzhan Yagci ("Akuma SRS," "we," "us," or "our"). By downloading, accessing, or using the Service, you agree to be bound by these Terms. If you do not agree, do not use the Service.

Summary

Effective date: June 08, 2026

A. The Service

Short version: Akuma SRS is a Japanese kanji learning app that runs on your device. There are no user accounts.

Akuma SRS is a mobile application that helps you learn and review Japanese kanji using spaced repetition and handwriting recognition. The App does not require you to create an account, register, or log in. Your decks, review history, and progress are stored locally on your device. Some features are free; others require a paid subscription as described in Section D.

B. Eligibility

Short version: You must be at least 13, or older if your country requires it.

You must be at least 13 years of age to use the Service. If the minimum age of digital consent in your country is higher than 13, you must meet that higher age. If you are under the age of majority where you live, you may use the Service only with the involvement of a parent or legal guardian who agrees to these Terms. The Service is not directed to children under 13, and we do not knowingly collect personal information from them.

C. License to Use the App

Short version: We give you a personal, non-transferable license to use the App. Don't copy, resell, or reverse engineer it.

Subject to your compliance with these Terms, we grant you a limited, personal, non-exclusive, non-transferable, revocable license to download and use the App on devices that you own or control, for your personal, non-commercial use. This license is also subject to the usage rules of the app store from which you obtained the App.

You may not, and may not permit anyone else to:

• copy, modify, or create derivative works of the App, except as permitted by law;
• distribute, sell, rent, lease, sublicense, or otherwise commercially exploit the App or any part of it;
• reverse engineer, decompile, or disassemble the App, or attempt to derive its source code, except to the extent this restriction is prohibited by applicable law;
• remove or alter any proprietary notices in the App; or
• use the App in any way that violates these Terms or applicable law.

D. Subscriptions and Billing

Short version: Paid features are sold as auto-renewable subscriptions through the app stores. You manage and cancel them in your store account, and refunds are handled by the store.

1. Auto-Renewable Subscriptions

Akuma SRS offers premium features through auto-renewable subscriptions, currently available on a weekly and a monthly basis. Pricing is shown in the App and in the relevant app store before you purchase, and may vary by region and currency. Your subscription gives you access to the premium features for the duration of the billing period you select.

2. Free Trials

We may offer a free trial for a subscription. Unless you cancel at least 24 hours before the end of the trial period, the trial will automatically convert into a paid subscription and your payment method will be charged. Any unused portion of a free trial is forfeited when you purchase a subscription.

3. Payment and Auto-Renewal

Payment is charged to your Apple App Store or Google Play account at confirmation of purchase. Subscriptions automatically renew at the then-current price unless auto-renewal is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. We never receive or store your payment card details; all payments are processed by the app store.

4. Managing and Cancelling

You can manage or cancel your subscription, and turn off auto-renewal, at any time through your Apple App Store or Google Play account settings. Cancelling stops future renewals; your access to premium features continues until the end of the period you have already paid for.

5. Refunds

Because subscriptions are sold through the app stores, refunds are handled by Apple or Google in accordance with their policies, not by us. We are generally unable to issue refunds directly. If you believe you are entitled to a refund, please contact the relevant app store.

6. Price Changes

We may change subscription prices from time to time. Where required, the app store will notify you of a price change and, depending on the platform, ask you to confirm before the change takes effect. If you do not agree to a new price, you can cancel before it applies.

E. Acceptable Use

Short version: Use the App lawfully and don't try to break, abuse, or misuse it.

You agree that you will not:

• use the Service in violation of any applicable law or regulation, including export-control laws;
• interfere with, disrupt, or attempt to gain unauthorized access to the Service or its related systems;
• use automated means to access the Service in a way that places an unreasonable load on our infrastructure, or scrape or harvest data from the website except for non-commercial research or archival purposes that comply with our Privacy Policy;
• attempt to circumvent any technical limitations, license checks, or subscription controls in the App; or
• use the Service to infringe the intellectual property or other rights of any party.

F. Intellectual Property

Short version: We (and our licensors) own the App and its content. You only get the rights we grant in these Terms.

The App, the website, and all of their content — including software, text, graphics, designs, the user interface, and learning content — are owned by Oguzhan Yagci or our licensors and are protected by intellectual property laws. We reserve all rights not expressly granted to you in these Terms. You may not duplicate, copy, or reuse any portion of the App's code, visual design, or content without our prior written permission.

Certain reference data used in the App (such as kanji stroke data) may be provided under third-party open licenses; the applicable license notices are available within the App.

G. Your Data and Privacy

Short version: Your learning data stays on your device. Our Privacy Policy explains the limited data shared with our providers.

Akuma SRS does not use accounts, and your learning data (decks, review history, progress, and preferences) is stored locally on your device. It is not uploaded to our servers and is removed when you uninstall the App. We use a small number of third-party services for subscriptions and advertising measurement, as described in our Privacy Policy, which is incorporated into these Terms by reference. Please review it to understand how your information is handled.

Because your data is stored only on your device, we cannot recover it for you if you delete the App, lose your device, or clear its storage. You are responsible for any backups your device platform provides.

H. Third-Party Services

Short version: Apple, Google, and our service providers have their own terms, which also apply to you.

The Service relies on third-party providers, including the Apple App Store and Google Play (distribution and payments), RevenueCat (subscription management), and AppsFlyer (attribution and marketing measurement). Your use of those services is also governed by their respective terms and privacy policies. We are not responsible for the practices of third parties.

I. Disclaimers and Limitation of Liability

Short version: The Service is provided "as is," and our liability to you is limited. Please read this carefully.

1. Disclaimer of Warranties

The Service is provided "as is" and "as available," without warranty of any kind, whether express, implied, or statutory, including any implied warranties of merchantability, fitness for a particular purpose, title, accuracy, and non-infringement. We do not warrant that the Service will be uninterrupted, secure, or error-free, that defects will be corrected, or that the learning content is complete or accurate. You use the Service at your own risk. Some jurisdictions do not allow the exclusion of certain warranties, so some of the above may not apply to you.

2. Limitation of Liability

To the maximum extent permitted by law, we will not be liable for any indirect, incidental, special, consequential, or exemplary damages, or for any loss of data, profits, or goodwill, arising out of or related to your use of or inability to use the Service. To the maximum extent permitted by law, our total liability for any claim arising out of or relating to these Terms or the Service will not exceed the greater of the amount you paid us for the Service in the twelve months before the claim, or USD 50. Some jurisdictions do not allow certain limitations of liability, so some of the above may not apply to you.

3. Indemnification

You agree to indemnify and hold us harmless from any claims, liabilities, and expenses (including reasonable legal fees) arising out of your misuse of the Service or your violation of these Terms or any applicable law.

J. Changes and Termination

Short version: We may update the App and these Terms. Either of us can end this agreement.

1. Changes to the Service

We may modify, suspend, or discontinue the Service, or any feature of it, at any time, with or without notice. We are not liable to you or any third party for any such change.

2. Changes to These Terms

We may revise these Terms from time to time. For material changes, we will provide reasonable notice, such as by posting the updated Terms on the website and updating the effective date above, and where appropriate through the App. Your continued use of the Service after the changes take effect constitutes acceptance of the revised Terms. If you do not agree, you must stop using the Service.

3. Termination

These Terms remain in effect while you use the Service. You may end this agreement at any time by ceasing to use the Service and deleting the App. We may suspend or terminate your access to the Service if you violate these Terms or use the Service unlawfully. Provisions that by their nature should survive termination — including intellectual property, disclaimers, limitation of liability, and indemnification — will survive.

K. Governing Law and Disputes

Except where prohibited by applicable law, these Terms are governed by the laws of France, without regard to its conflict-of-law rules, and you and we agree to submit to the jurisdiction of the competent courts of France for any dispute not subject to the app store terms. Nothing in this section deprives you of the protection of the mandatory consumer-protection laws of your country of residence, or of your right, as a consumer, to bring proceedings in the courts of the place where you are domiciled.

L. Apple App Store Additional Terms

The following terms apply when you obtain the App from the Apple App Store:

• These Terms are between you and Oguzhan Yagci only, not with Apple. Apple is not responsible for the App or its content.
• The license granted in Section C is limited to use of the App on Apple-branded devices that you own or control, as permitted by the Apple Media Services Terms and Conditions.
• Apple has no obligation to provide maintenance or support for the App. Any support questions should be directed to us at ogu@akumasrs.io.
• To the extent permitted by law, Apple has no warranty obligation with respect to the App, and any warranty claims will be our responsibility.
• Apple is not responsible for addressing any claims by you or a third party relating to the App, including product-liability, regulatory, or intellectual-property claims.
• You represent that you are not located in a country subject to a U.S. Government embargo or designated as "terrorist supporting," and that you are not on any U.S. Government restricted-parties list.
• Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.

M. Miscellaneous and Contact

1. Entire Agreement

These Terms, together with our Privacy Policy, are the entire agreement between you and us regarding the Service and supersede any prior agreements.

2. Severability and Waiver

If any provision of these Terms is held unenforceable, the remaining provisions remain in full effect. Our failure to enforce any provision is not a waiver of our right to do so later.

3. Assignment

You may not assign or transfer these Terms without our prior written consent. We may assign these Terms in connection with a merger, acquisition, or sale of assets, or otherwise by operation of law.

4. Contact

Questions about these Terms? Contact us or email ogu@akumasrs.io.