Terms of Use
Last updated: 2026-03-18
These Terms of Use ("Terms") govern your use of HalfHalf ("App", "Service") provided by Konstantin Maurer ("we", "us", "our").
Please read these Terms carefully before using the Service.
1. Binding Agreement
By creating an account, accessing, or using the Service, you agree to these Terms and the Privacy Policy.
If you do not agree, do not use the Service.
2. Who May Use the Service
You may use the Service only if:
- you can form a legally binding agreement under applicable law; and
- you comply with these Terms and all applicable laws.
If you use the Service on behalf of an organization, you confirm you are authorized to bind that organization.
3. Service Description
The Service is a collaborative expense tracking and split-calculation tool. It is not:
- a bank, payment institution, money transmitter, escrow, or debt collection service;
- a tax advisor, accounting firm, legal advisor, or investment advisor.
The Service helps users record expenses, split amounts, and coordinate settlements among group members.
4. Accounts and Security
4.1 You are responsible for your account credentials, device security, and all activity under your account.
4.2 You must provide accurate account information and keep it reasonably up to date.
4.3 We may require re-authentication or verification for security reasons.
4.4 You must promptly notify us of suspected unauthorized access.
5. Group Collaboration and User Content
5.1 You and your group members are responsible for all data entered into the Service, including member names, expenses, categories, and settlement decisions.
5.2 Group owners/admins/writers may create, edit, or delete shared records according to in-app role permissions.
5.3 Group history and audit records may remain visible to preserve group accounting integrity.
5.4 You represent that you have the necessary rights to upload content (including receipt images and profile/group images).
5.5 You must not upload unlawful, infringing, deceptive, abusive, or malicious content.
6. Acceptable Use
You agree not to:
- use the Service for fraud, unlawful activity, money laundering, sanctions evasion, or rights violations;
- interfere with or disrupt the Service, including probing, scanning, bypassing, or overloading systems;
- reverse engineer, decompile, or attempt unauthorized extraction of source code except where mandatory law permits;
- use bots or automated methods in ways that violate these Terms or harm the Service;
- upload malware or harmful code.
We may suspend or restrict access to prevent harm, abuse, or legal violations.
7. Receipt Scan and AI-Assisted Features
7.1 Receipt scan and AI output are assistive only and may contain errors or omissions.
7.2 You must verify extracted values (merchant, date, currency, totals, and line items) before relying on them.
7.3 We may apply technical limits (for example scan quotas, file size/type limits, and rate limits).
7.4 Feature behavior may change due to model/provider updates, quality controls, safety requirements, or legal compliance.
8. Currency Conversion and Informational Data
8.1 Exchange-rate and conversion features are informational only and may be delayed, unavailable, or inaccurate.
8.2 Final settlement amounts are determined by users and/or the payment provider actually used.
8.3 We do not provide FX, trading, tax, or accounting advice.
9. Subscriptions, Trials, and Billing
9.1 Premium features may require a paid subscription or trial.
9.2 Purchases, renewals, cancellations, and refunds are processed by Apple App Store or Google Play and are subject to their terms and policies.
9.3 Unless required otherwise by mandatory law, billing disputes, refund requests, and charge handling for in-app purchases are handled by the relevant app store.
9.4 Subscription status may be active, grace period, billing retry, paused, expired, revoked, or similar states depending on store signals.
9.5 We may grant promotional access, trials, or manual overrides at our discretion and may define eligibility criteria.
10. Consumer Withdrawal and Cancellation Information
10.1 If mandatory consumer law grants a withdrawal right, that right remains unaffected.
10.2 For digital services and in-app purchases, withdrawal/cancellation handling may depend on the app-store process and your explicit consent/acknowledgments during purchase flow.
10.3 This clause does not limit any non-waivable rights under German, EU/EEA, California, or other applicable consumer laws.
11. Third-Party Services
11.1 The Service depends on third-party infrastructure and platforms (including Firebase/Google Cloud/Vertex AI, Apple, and Google Play).
11.2 We are not responsible for third-party outages, policy changes, billing actions, verification delays, or platform restrictions.
11.3 Links to third-party resources are provided for convenience and do not imply endorsement.
12. Intellectual Property and License
12.1 The Service (excluding user content) is protected by intellectual property laws.
12.2 Subject to these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to use the App for personal or internal business use.
12.3 You may not copy, distribute, modify, create derivative works from, or commercially exploit the Service except as expressly permitted by law or written permission.
12.4 Apple and Google may have additional license terms that apply to app binaries delivered through their stores.
13. Feedback
If you submit feedback, ideas, or suggestions, you grant us a worldwide, non-exclusive, royalty-free license to use them for operating and improving the Service, without obligation to compensate you.
14. Availability, Maintenance, and Changes
14.1 We may modify, maintain, suspend, or discontinue parts of the Service to improve quality, security, legal compliance, or product functionality.
14.2 Where required by law, we will provide notice for material adverse changes.
14.3 We do not guarantee uninterrupted or error-free operation.
15. Suspension and Termination
15.1 You may stop using the Service at any time and may request account deletion through available app features.
15.2 We may suspend or terminate access where reasonably necessary for legal compliance, security, abuse prevention, or material breach of these Terms.
15.3 Upon termination, some historical shared records may remain where necessary to preserve other users' legitimate accounting records, legal obligations, fraud prevention, or dispute resolution.
16. Disclaimers
To the maximum extent permitted by law, the Service is provided "as is" and "as available" without warranties of any kind, whether express, implied, or statutory, including implied warranties of merchantability, fitness for a particular purpose, and non-infringement.
Additional details are set out in the Disclaimer.
Nothing in these Terms excludes warranties or rights that cannot be excluded under mandatory law.
17. Limitation of Liability
17.1 Nothing in these Terms excludes or limits liability where exclusion is prohibited by law, including liability for:
- intent (Vorsatz) and gross negligence (grobe Fahrlassigkeit);
- injury to life, body, or health;
- fraud and fraudulent misrepresentation;
- breach of guarantees expressly assumed;
- mandatory product liability and other non-waivable statutory claims.
17.2 In cases of slight negligence, liability is limited to breach of essential contractual obligations (wesentliche Vertragspflichten / Kardinalpflichten) and to foreseeable, typical damages.
17.3 To the extent legally permissible, liability for indirect, incidental, special, consequential, exemplary, or punitive damages is excluded.
17.4 Any liability limitations also apply in favor of our legal representatives, employees, and agents.
18. Indemnity for Non-Consumer or Misuse Cases
To the extent permitted by law, you agree to indemnify and hold us harmless against third-party claims, losses, and costs arising from your unlawful use of the Service, your breach of these Terms, or your infringement of third-party rights.
This clause applies only to the extent such indemnification is valid under applicable mandatory consumer law.
19. Governing Law and Jurisdiction
19.1 If you are a consumer habitually residing in the EU/EEA, UK, Switzerland, California, or another jurisdiction with mandatory consumer protections, those mandatory protections remain unaffected.
19.2 For non-consumer users, these Terms are governed by German law, excluding conflict-of-law rules and excluding the UN Convention on Contracts for the International Sale of Goods (CISG), to the extent legally permissible.
19.3 Exclusive place of jurisdiction for non-consumers, where legally allowed, is the registered seat of the provider in Germany.
20. International Use and Compliance
You are responsible for complying with local laws applicable to your use of the Service. The Service may not be available in all countries or in all languages.
21. Changes to These Terms
21.1 We may update these Terms for valid reasons, including legal, security, technical, or product-related changes.
21.2 We will update the "Last updated" date and, where required by law, provide additional notice.
21.3 Continued use after effective updates constitutes acceptance to the extent permitted by law.
22. Severability and No Waiver
22.1 If any provision is invalid or unenforceable, the remaining provisions remain in effect.
22.2 Failure to enforce a provision is not a waiver of that provision.
23. Language
These Terms may be provided in multiple languages. In case of conflict, the legally controlling language will be determined by applicable law; for operational reference, the English version is used in-app.
24. Contact
Legal and support contact:
kjm.application@gmail.com
Provider details (name and postal address) are available in the Imprint.