Last updated: April 2026
Ruven Czenkusch, An der Brunnenstube 15/12, 55120 Mainz, Germany
Email: support@combatcompanion.app
Encounter data, saved characters, combat history and app settings are stored locally in your browser (localStorage) — regardless of whether you are signed in or not. This data never leaves your device unless you explicitly export it.
If you create an account, only account and subscription data (email, plan status) are transmitted to our servers. See sections 3 and 4.
If you submit your email address for launch notifications, your email address is stored with Convex Inc. (San Francisco, CA, USA) under the same conditions as section 4. Legal basis: Art. 6(1)(a) GDPR (consent via explicit checkbox at time of signup). You may withdraw your consent at any time by contacting support@combatcompanion.app.
If you create an account, your email address and account data are processed. Legal basis: Art. 6(1)(b) GDPR (performance of contract).
Authentication is provided by Clerk Inc. (San Francisco, CA, USA). Data transfer to the USA is governed by Standard Contractual Clauses (SCCs). See Clerk Privacy Policy.
Account and subscription data are stored with Convex Inc. (San Francisco, CA, USA). Data transfer to the USA is governed by SCCs. See Convex Privacy Policy.
Payments are processed by Stripe, Inc. (San Francisco, CA, USA). We never store your payment card details — they are handled directly by Stripe. Stripe is PCI DSS Level 1 certified. Data transfer to the USA is governed by SCCs. See Stripe Privacy Policy. Legal basis: Art. 6(1)(b) GDPR.
This website is hosted by Vercel Inc. Technical connection data (IP address, timestamps) may be processed as part of hosting. See Vercel Privacy Policy.
Monster search data is retrieved from the public Open5e API. Search queries are transmitted to their servers. No personal data is included.
You have the right to access, rectify, erase, restrict processing, and data portability (Art. 15–20 GDPR). To exercise these rights, contact us at support@combatcompanion.app. We will respond within one month (Art. 12(3) GDPR).
You may lodge a complaint with the supervisory authority responsible for our place of business: Der Landesbeauftragte für den Datenschutz und die Informationsfreiheit Rheinland-Pfalz, Hintere Bleiche 34, 55116 Mainz, www.datenschutz.rlp.de (Art. 77 GDPR).
Where processing is based on your consent (e.g. email signup), you may withdraw that consent at any time by contacting support@combatcompanion.app. Withdrawal does not affect the lawfulness of processing prior to withdrawal (Art. 7(3) GDPR).
A data protection officer is not required under § 38 BDSG for our current scale of processing. For all privacy inquiries contact the data controller above.