Effective as of September 20, 2026
These terms of service (the "Terms") govern the mutual rights and obligations between the operator of the Chronotika mobile app ("Chronotika," "we," or the "app") and its user (the "user" or "you").
Chronotika is an educational app focused on teaching history through short lessons, quizzes, and personal progress tracking. By creating a user account or using the app, you agree to these Terms.
The current version of these Terms is always available directly in the app, in the Account section.
Full use of the app requires creating a user account. An account may be created using an email address and password or through a supported third-party authentication provider such as Apple or Google. The user must provide truthful information and protect their login credentials from misuse by third parties.
A user account is intended for personal, non-commercial use. The user is responsible for all activity carried out under their account.
The app is intended for individuals aged 15 and over. Individuals under 15 may only use the app with the consent of a legal guardian.
The free version of the app provides access to the introductory chapters of selected courses at no charge. Access to further chapters and courses requires an active Chronotika Premium subscription ("Premium").
Premium is provided as a recurring monthly or annual subscription. The current price is always shown in the app before you complete a purchase.
The scope of content available for free, as well as within Premium, may change over time — for example, through the addition of new courses or chapters. Chronotika does not guarantee the permanent availability of any specific content.
Premium payments are processed exclusively through the App Store (Apple) or Google Play payment system, depending on the platform the app is installed on. Chronotika does not have access to, and does not itself process, the user's payment details.
A subscription automatically renews for the next period (month or year) at the same price unless the user cancels it at least 24 hours before the end of the current period. Cancellation is done in the account settings of the relevant store (App Store / Google Play), not in the Chronotika app.
If the price of Premium changes, the user will be notified with sufficient advance notice through the store where the subscription is managed, and will have the opportunity to cancel the subscription before the new price takes effect.
Because this involves the provision of digital content that is made accessible with the user's express consent before the withdrawal period expires, once Premium content has been made accessible the user does not have the right to withdraw from the contract within 14 days, in accordance with Section 1837(l) of the Civil Code.
Refund requests are governed by the policies of the relevant store (App Store / Google Play) through which the purchase was made. Chronotika does not itself process refunds.
All content in the Chronotika app — text, images, graphical elements, course structure, quizzes, the logo, and the design — is protected by copyright and other intellectual property rights and belongs to Chronotika or its licensors.
The content is intended solely for personal study use within the app. Copying, reproducing, publicly distributing, modifying, or otherwise using it outside the app without Chronotika's prior written consent is prohibited.
Violating this provision may result in immediate termination of the user account and possible further legal action.
The user agrees to use the app in accordance with its intended purpose and applicable law, and in particular to refrain from attempting unauthorized access to other users' accounts, disrupting the app's operation, or circumventing the mechanisms used to evaluate quizzes and progress.
Chronotika reserves the right to temporarily restrict or terminate the account of a user who violates these rules.
Chronotika makes reasonable efforts to ensure that its educational content is factually accurate, but cannot guarantee its absolute completeness or freedom from error. The content is provided for educational purposes and does not replace professional historical or academic sources.
Chronotika is not liable for damage arising from an interruption in the app's availability, nor for indirect or consequential damages, except where liability cannot be limited under applicable law.
Chronotika may update these Terms from time to time, in particular in connection with changes to the app's features or to applicable law. Users will be notified in the app of any material changes. By continuing to use the app after the new Terms take effect, the user agrees to them.
The user may stop using the app at any time and request deletion of their account by sending a request to chronotika@chronotika.com. Existing study progress, XP, and streak can also be cleared independently at any time directly in the app, in the Account section.
Chronotika reserves the right to terminate a user's account in the event of a serious or repeated violation of these Terms.
These Terms are governed by the laws of the Czech Republic, in particular Act No. 89/2012 Coll., the Civil Code, and, where the user is a consumer, also Act No. 634/1992 Coll., on Consumer Protection.
Chronotika seeks to resolve any disputes primarily out of court. A consumer has the right to bring an out-of-court consumer dispute resolution proceeding before the Czech Trade Inspection Authority (www.coi.cz).
If you have any questions about these Terms, please contact us at chronotika@chronotika.com.