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Terms of Use — KontrolSub

Version: 1.0
Last updated: April 11, 2026
Developer: Vektor Digital
Contact: contato@vektordigital.com.br

1. Acceptance of Terms

By downloading, installing, or using the KontrolSub application (“App”), you expressly and irrevocably agree to these Terms of Use. If you do not agree with any part of this document, you are not authorized to use the App.

2. Description of Service

KontrolSub is a personal recurring subscription management app. It allows the user to:

  • Register, edit, and delete digital service subscriptions.
  • View consolidated monthly and annual expenses.
  • Manage free trial periods (trial) and billing dates.
  • Receive local reminder notifications and expiration alerts.
  • Access a financial calendar of upcoming payments.

KontrolSub does not process payments, does not have access to bank accounts, and does not execute financial transactions on behalf of the user. All information is manually entered by the user.

3. Registration and User Account

3.1 Anonymous Registration

KontrolSub adopts a Lazy Registration approach: upon opening the App for the first time, an anonymous account is automatically created via Firebase Authentication, without requiring an email address or password. This allows immediate use of the App.

3.2 Account Linking

The user may, at any time, link their anonymous account to:

  • Google: via Google Sign-In.
  • Apple: via Sign In with Apple (exclusive to iOS users).

Linking is not mandatory, but is recommended to ensure data is preserved in case of device change or App reinstallation.

3.3 Account Responsibility

You are responsible for maintaining the security of your device and the credentials of your linked Google or Apple accounts. Vektor Digital is not responsible for unauthorized access resulting from a security failure on the user’s side.

4. Acceptable Use

The user agrees to use the App exclusively for lawful and personal purposes. The following are expressly prohibited:

  • Using the App for any illegal or unauthorized purpose.
  • Attempting to reverse engineer, decompile, or extract the App’s source code.
  • Entering false information with the intent to deceive other users or systems.
  • Using the App to collect data from third parties without their consent.

5. Plans, Subscriptions, and In-App Purchases

KontrolSub may offer paid plans and premium features through in-app purchases managed by:

  • Apple App Store (for iOS/iPadOS users).
  • Google Play Store (for Android users).

Purchases are processed entirely by the respective app stores. Vektor Digital does not store credit card data or any payment information. All refunds must be requested directly from Apple or Google, in accordance with each platform’s policies.

6. Intellectual Property

All content in the App — including source code, design, logos, texts, icons, and features — is the exclusive property of the developer or licensed to them. Any reproduction, distribution, or modification without prior written authorization is prohibited.

All third-party logos and trademarks displayed in KontrolSub are the property of their respective owners. These logos are used solely for informational purposes, to identify the services to which the user’s subscriptions relate. KontrolSub is not affiliated with, endorsed by, or sponsored by any of the listed services.

7. Disclaimer of Warranties

7.1 Accuracy of Information

KontrolSub is a tool to assist with personal financial control. We do not guarantee the accuracy, completeness, or timeliness of information entered by the user. Financial decisions made based on App data are the sole responsibility of the user.

7.2 Service Availability

The App is provided “as is”, without warranty of uninterrupted availability. Vektor Digital reserves the right to modify, suspend, or discontinue the service at any time, with or without notice.

7.3 Third-Party Services

KontrolSub integrates third-party services (Google Firebase, RevenueCat, Google Sign-In, Apple Sign-In). Vektor Digital is not responsible for failures, outages, or changes in these external services.

8. Limitation of Liability

To the maximum extent permitted by applicable law, the developer will not be liable for any indirect, incidental, special, or consequential damages arising from the use of or inability to use the App, including, without limitation, loss of data or profits.

9. Termination

Vektor Digital may terminate or suspend the user’s access to the App at any time without prior notice in the event of a violation of these Terms. The user may terminate use of the App at any time by uninstalling it from their device.

10. Changes to Terms

Vektor Digital reserves the right to modify these Terms at any time. Changes take effect upon publication. Continued use of the App after the publication of new Terms constitutes acceptance of the changes.

11. Governing Law and Jurisdiction

These Terms are governed by the laws of the Federative Republic of Brazil. For international users, disputes that cannot be resolved amicably may also be subject to the mandatory consumer protection laws of the user’s country of residence, to the extent required by applicable law.

12. Contact

For questions about these Terms, please contact us at: contato@vektordigital.com.br