Last updated: 2 October 2026
These Terms of Service ("Terms") govern your use of the Cathartic mobile application ("App"), the website at cathartic.featurehear.com ("Website") and the browser-based study tool at cathartic.featurehear.com/study ("Study app"), collectively referred to as the "Service." The Service is operated by Štěpán Šrubař, Ostrava, Czechia ("we," "us," or "our").
By accessing or using the Service, you agree to be bound by these Terms. If you do not agree, do not use the Service.
You must be at least 15 years old (or the age of digital consent in your country, if higher) to create an account. Younger players may use the App as a guest, without an account, under the supervision and with the consent of a parent or legal guardian. Parents and guardians are responsible for their children's use of the Service.
An account is optional. You may create one with an email address and password, or sign in with your Google account. In both cases we receive your email address and a display name, which we use for authentication, account management and leaderboards as described in our Privacy Policy.
You may optionally enable Google Drive sync. The App then stores your study data in a hidden application folder of your own Google Drive. You are responsible for your Google account and for the storage space it provides; we cannot access, recover or delete data in your Drive.
You are responsible for maintaining the security of your account and for all activity that occurs under it. Notify us immediately at gamemaster@featurehear.com if you suspect unauthorized use of your account.
Cathartic is a free-to-play tower defense game in which you answer flashcards to produce combatants and build towers. You agree to use the Service only for its intended purpose and in compliance with all applicable laws.
You may not:
When you finish a game while signed in, your display name and score are submitted to leaderboards that other signed-in players can see. Your display name is also shown to players who search for you, to your friends, to your duel opponents and to the players in your team games, as described in our Privacy Policy. Choose a display name that is not offensive, misleading or infringing; we may change or remove names that violate these Terms.
Scores are computed on your device. Manipulating the App, the network traffic or the scoring in any way is prohibited. We may remove scores, hide you from leaderboards, or restrict or terminate your account if we reasonably believe you have cheated or abused the Service.
You may create or import flashcard decks and other content within the App ("User Content"). You retain ownership of your User Content. It is stored on your device and, if you enable Drive sync, in your own Google Drive; we do not receive a copy. The only User Content that reaches our servers is your chosen display name, the names you give team games, and the names of your decks shown to your duel opponent while you choose a deck. You grant us a non-exclusive, royalty-free license to store and display these for the purpose of providing the Service. The rules for display names above apply to them as well.
You are solely responsible for your User Content and for respecting the rights of others, including when importing decks created by third parties.
All rights, title, and interest in the Service (excluding User Content), including but not limited to its design, code, graphics, and gameplay mechanics, are owned by Štěpán Šrubař. You may not copy, modify, or distribute any part of the Service without prior written permission.
We may suspend or terminate your access to the Service at any time, with or without cause, and without prior notice. You may stop using the Service at any time. To delete your account and data, follow the steps on Delete Your Account.
The Service is provided "AS IS" and "AS AVAILABLE" without warranties of any kind, whether express or implied. We do not guarantee that the Service will be uninterrupted, error-free, or secure.
To the maximum extent permitted by applicable law, Štěpán Šrubař shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising out of or related to your use of the Service.
These Terms are governed by the laws of the Czech Republic. Any disputes arising from these Terms shall be resolved by the competent courts of the Czech Republic. If you are a consumer in the European Union, this does not deprive you of the protection of mandatory consumer law of your country of residence, and you may also use the European Commission's online dispute resolution platform.
We may update these Terms from time to time. If we make material changes, we will notify you by updating the effective date at the top of this page. Your continued use of the Service after any changes constitutes acceptance of the updated Terms.
If you have any questions about these Terms, contact us at: