Last updated September 25, 2026
Please read these Terms of Use (“Terms”) carefully before using our Service. These Terms govern your access to and use of the Serena application (the “App”), available on the Apple App Store and Google Play, and any related services. By downloading, installing, subscribing to or using the App you agree to be bound by these Terms. If you do not accept every provision, do not use the App.
You must be at least 13 years old (or the legal age in your jurisdiction) and capable of forming a binding contract. If you are under 18, you may use the App only with a parent’s or guardian’s consent.
Prices are shown in U.S. dollars; Apple or Google will convert to your local currency where required. We may add or change plans; you will be notified of price changes at least 30 days in advance.
All payments, free trials and renewals are billed through the Apple App Store or Google Play, depending on your device, and processed by RevenueCat on our behalf. We never receive your payment details.
If you start a free trial, your Apple ID or Google account will be charged for the chosen plan at the end of the trial unless you cancel at least 24 hours before trial expiry.
Subscriptions renew automatically for the same period unless canceled at least 24 hours before the current period ends. On iOS, cancel under Settings → your name → Subscriptions. On Android, cancel in the Play Store under your profile → Payments & subscriptions → Subscriptions. Deleting the App does not cancel your subscription.
Purchases are generally final; refunds are handled by Apple or Google under their own policies, not by us directly.
Subject to these Terms, we grant you a limited, non-exclusive, non-transferable, revocable licence to install and use the App for your personal, non-commercial use.
You may not:
The App provides self-help tools for managing skin-picking urges and related behaviours. It does not offer medical diagnosis, treatment or advice and is not a medical device. Always consult a qualified health-care professional for medical concerns. Never delay seeking professional advice because of content in the App. Individual results vary.
All urge logs and settings are stored locally on your device unless you export them. You are solely responsible for the accuracy of the data you enter and for maintaining appropriate device security (passcode, biometrics, backup). Skin scan images are transmitted securely for analysis of healing progress. These images are never stored or used otherwise and are deleted immediately after analysis.
We also use PostHog to collect anonymous analytics about how the App is used, so that we can improve it. This data is linked to a random identifier, not to your name or store account, and is stored in the European Union. See the Privacy Policy for detail.
Our Privacy Policy describes what information we collect, how we use it and your rights, including the analytics we collect through PostHog and the skin-scan images analysed by Google. We do not sell your data or show advertising. By using the App you acknowledge that you have read the Privacy Policy, and you may object to analytics at any time by e-mailing contact@krimi.ai.
The App relies on the following third parties:
Your use of these services is also governed by their own terms and privacy policies. We are not responsible for their actions.
You agree not to:
All code, graphics, text and design elements in the App are owned by Jonas Hiltl or licensed to us. No rights are transferred except the limited licence in Section 3.
We may suspend or terminate your licence at any time if you breach these Terms. You may stop using the App and delete it at any time. Sections 5, 6, 10, 11 and 13 survive termination.
The App is provided “as is” and “as available.” To the maximum extent permitted by law, we disclaim all warranties, express or implied, including merchantability, fitness for a particular purpose, accuracy and non-infringement. We do not guarantee that the App will be uninterrupted, error-free or that it will meet your expectations.
To the fullest extent permitted by law, we shall not be liable for indirect, incidental, special, consequential or punitive damages, or for loss of data, profits or reputation, arising out of or relating to the App or these Terms, even if advised of the possibility. Our total liability shall not exceed the greater of (a) the amount you actually paid for the current subscription period, or (b) USD 10.
These Terms are governed by the laws of Germany, without regard to its conflict of law principles. Any disputes arising out of these Terms or the App are subject to the exclusive jurisdiction of the courts in Passau, Germany, where this is permitted by law.
We may modify these Terms at any time. Material changes will be announced via an in-app notice or store release notes. Continued use of the App after the effective date constitutes acceptance of the revised Terms.
If any provision of these Terms is held invalid or unenforceable, the remaining provisions remain in full force and effect.
These Terms, together with the Privacy Policy, constitute the entire agreement between you and us regarding the App and supersede all prior understandings.
The EU Commission provides a platform for online dispute resolution: https://ec.europa.eu/consumers/odr. We are not obliged, and generally not willing, to participate in dispute resolution proceedings before a consumer arbitration board (§ 36 VSBG).
Jonas Hiltl
E-mail: contact@krimi.ai
By tapping “Try for Free,” “Subscribe” or otherwise using the App, you confirm that you have read, understood and agree to these Terms of Use.