Terms of Use

Tracal · Support · 日本語

This English version is provided for convenience. The Japanese version is the original.

These Terms of Use ("Terms") set out the conditions for using the "Tracal" mobile application (the "App") provided by d mark ("we", "us"). By installing or using the App, you agree to these Terms.

1. Definitions

  1. "AI Models" means language and translation model files that you download to your device through the App from third-party distributors in order to run them in the App.
  2. "Your Content" means the text, files and images you enter or load into the App, your glossaries and custom tones, and the translations the App generates.

2. License

  1. We grant you a non-transferable, non-exclusive right to use the App on your own device for your own purposes, including your own work, in accordance with these Terms.
  2. All intellectual property rights in the App (program, design, logos, etc.) belong to us or the rightful owners.
  3. Except as permitted by law, you may not copy, modify, reverse engineer, decompile or disassemble the App.

3. AI Models and Third-Party Licenses

  1. AI Models are not made by us. They are provided under licenses set by their developers (such as the Gemma Terms of Use, Apache License 2.0 and the Qwen Research License). The license for each model is shown in the model list in the App and on the support site.
  2. When you download and use an AI Model, you must follow that model's license and usage policy, including any prohibited uses. Some models may be used for non-commercial purposes only.
  3. AI Model files are downloaded directly from distributors operated by third parties, such as Hugging Face. We do not guarantee their continued availability, content or quality.
  4. AI Model names and trademarks belong to their respective owners. We are not affiliated with or endorsed by them.

4. Your Content

  1. You (or the rightful owner) keep all rights in Your Content. We do not receive Your Content.
  2. You are responsible for making sure you have the necessary rights or permission for any text, file or image you translate. Do not use the App in breach of third-party copyright, a confidentiality agreement or other rights or obligations.
  3. Publishing or distributing a translation may require permission from the copyright holder of the original.

5. Translations

  1. Translations are generated probabilistically by an AI Model on your device. They may contain mistranslations, omissions, shifts in meaning or nuance, or content not in the original. Accuracy varies by language.
  2. Always check a translation before relying on it.
  3. The App is not intended to be the sole basis for translations used in medical situations (including medication and allergy information), legal or contractual matters, tax, safety, or any other situation that could seriously affect a person's life, health or property. Consult a qualified translator or professional in those cases.

6. Paid Features

  1. Paid features are offered as a one-time purchase through Google Play. There are no subscriptions and no ads.
  2. Payment, billing and refunds are handled under the Google Play Terms of Service and refund policies. Please request refunds from Google Play. This does not limit any rights you have under applicable law.
  3. You can restore your purchase with the App's "Restore purchase" function on a device signed in to the same Google account you used to buy it.
  4. What each paid feature includes is shown in the App and on the store listing.

7. Prohibited Conduct

You must not:

  1. break the law or act against public order and morals;
  2. infringe our or anyone else's copyright, privacy or other rights;
  3. breach an AI Model's license or usage policy;
  4. exploit vulnerabilities in the App or circumvent the limits of paid features; or
  5. do anything similar to the above.

8. Data Storage and Loss

  1. Your Content (including translation history, glossaries and custom tones) and settings are stored on your device. We do not keep a copy and cannot restore it.
  2. Data may be lost if you uninstall the App or if your device breaks, is lost or is reset. Use the App's backup (export) function to save the data you need yourself.
  3. A file exported with the backup function contains your custom tones, glossaries and settings, and, if you choose, your translation history (source text and translations). The file is encrypted with a password you set when exporting. The password is not stored on your device or in the file, so if you forget it, the file cannot be restored, and we cannot recover it either. Please manage the password yourself. Exporting happens only when you do it, and the file goes to the location or destination you choose (cloud storage, email, etc.). After that, you are responsible for keeping and managing the file. We cannot access exported files and are not responsible for their leakage or loss.
  4. Please keep your device secure (screen lock, OS updates, no rooting) to prevent data leaks or loss caused by malware, OS vulnerabilities, theft or loss.

9. Changes to and Discontinuation of the App

We may change the App or stop providing it. If we stop providing it, we will announce this on the support site in advance where possible.

10. Disclaimer and Limitation of Liability

  1. We do not guarantee that the App or its translations are fit for a particular purpose, accurate or free of defects.
  2. We are not liable for damage arising from your use of the App, except where caused by our intent or gross negligence.
  3. Notwithstanding the above, if you are a consumer and our ordinary negligence (not gross negligence) causes you damage, our liability is limited to direct and ordinary damage, up to the amount you paid us for the App.
  4. These limits do not apply to damage caused by our intent or gross negligence, or where the law does not allow liability to be limited.

11. Minors

If you are a minor, use the App (including making purchases) with the consent of a parent or guardian. The App is not directed at children under 13.

12. Changes to These Terms

We may change these Terms in accordance with Article 548-4 of the Civil Code of Japan. We will post the new Terms and their effective date on the support site a reasonable time before they take effect.

13. Governing Law and Jurisdiction

These Terms are governed by the laws of Japan. The district court with jurisdiction over the operator's location has exclusive jurisdiction in the first instance over any dispute about the App. However, mandatory consumer protection laws of your country of residence still apply where relevant.

Contact

d mark — Email: dev@d-mrk.com
Effective: October 14, 2026
Revised: October 15, 2026 (backup function added)