Terms of Use

Effective date: September 4, 2026
Last updated: October 26, 2026

1. Acceptance of these Terms

Service provider and data controller: Mad Forge Design, obrt za usluge, vl. Luka Brajković, Zagreb, Poljačka ulica 67, 10000 Zagreb, Croatia. We use Mad Forge Design as our public brand.

These Terms of Use ("Terms") govern your use of Rhythm Adaptive Calendar ("Rhythm" or the "App"), created by Mad Forge Design ("we", "us" or "our"). By installing or using the App, you agree to these Terms. If you do not agree, do not use the App.

Nothing in these Terms limits rights that cannot lawfully be excluded or limited under applicable consumer protection law.

2. License to use Rhythm

Subject to these Terms and applicable Google Play terms, Mad Forge Design grants you a limited, personal, non-exclusive, non-transferable and revocable license to install and use the App on compatible Android devices associated with you.

You may not copy, resell, rent, sublicense, reverse engineer or misuse the App except where such restriction is prohibited by law or where a component is provided under an open-source license that expressly permits it.

3. What Rhythm does

Rhythm is a local-first calendar and time-planning tool. Features may include calendar views, event editing, tasks, Adaptive Day suggestions, optional multi-device cloud synchronization, travel and leave-by estimates, reminders, Event Packs, preparation and recovery time, widgets, local search, Life Admin information and paid Pro features.

Some features depend on Android permissions, compatible device capabilities, your calendar provider, Google Play services or information you enter. Feature availability can vary by Android version, device manufacturer, country and service configuration.

4. Your calendar data and content

You retain your rights in calendar content, notes, tasks, checklists and other information you enter into or access through Rhythm. You are responsible for the accuracy, legality and appropriateness of the content you create or import.

When you permit Rhythm to write to an Android calendar, changes can be synchronized by the calendar account/provider connected to that calendar. You are responsible for reviewing important changes, especially deletions, recurring events and schedule adjustments.

Cloud sync is optional. If you enable it with Google sign-in, you authorize Rhythm to store and synchronize an account-scoped copy of Rhythm events, tasks, local calendar lists and preferences through Firebase. Changes and deletions made on one connected device can be applied to other connected devices. Attached files and entries owned by Android Calendar Provider are not copied into Rhythm cloud storage. You can delete the cloud copy and disconnect from Settings; local data on the current device remains until you delete it separately.

5. Adaptive Day and recommendations

Save my day, reviewing and applying schedule changes and moving events on the timeline are unlimited in both Free and Pro. They do not consume online route calculations.

Adaptive Day, free-time suggestions, reminder timing and similar features are planning aids. They may use deterministic rules, estimates and the information available to the App. Unless a feature explicitly says otherwise, Rhythm will present suggested schedule changes for your review before applying them.

You remain responsible for deciding whether a suggested change is appropriate. Important appointments, travel, work obligations, medical appointments, legal deadlines and other time-sensitive commitments should be independently verified.

6. Travel and leave-by information

Online routes: Google sign-in is required. Free includes three successful online route calculations in total per Google account, not per month or installation. Reinstalling the app, signing out or deleting the Rhythm account does not renew the trial. Pro includes three online route calculations per day, reset at midnight UTC. All supported online travel modes share the same allowance. Car routes include traffic; walking, cycling and public transport do not use road-traffic estimates. Offline estimates from a distance you enter are unlimited in both plans and run on your device.

Sign-in does not enable calendar sync. Signing in for routes or purchase verification authenticates your Rhythm account. Uploading your private Rhythm calendar data requires separately enabling Cloud sync. Android calendar accounts are managed separately by Android and their providers.

Travel estimates can be affected by inaccurate event locations or distances, traffic, weather, road closures, public transport changes, parking, walking speed, accessibility needs and other factors outside Rhythm's control. Do not rely on Rhythm as your only source for time-critical travel decisions, emergencies or safety-critical navigation.

7. Notifications and reminders

Rhythm may use Android notifications and alarms to remind you about events or recommended departure times. Android power management, permission settings, device restarts, clock changes, battery restrictions or operating-system behavior can delay or prevent notifications. You are responsible for maintaining independent reminders for critical obligations.

8. Pro purchases and subscriptions

Closed beta: the app remains in closed testing. Only accounts configured as Google Play license testers should test purchases, using a Google Play test payment instrument. Membership of the closed test alone does not make a purchase free. If the Play confirmation shows a real card or payment method instead of a test instrument, cancel that purchase. This website update does not open public distribution or enable real customer payments.

Changing plans: a monthly-to-annual or annual-to-monthly change is scheduled for the end of the current paid period when confirmed by Google Play. Until then, your existing plan and Pro access continue. Google Play displays the applicable price and effective date.

Cancellation: cancelling renewal prevents future renewals; Pro continues until the already-paid period expires, then the app returns to Free. Your events and other local data are retained. Cancellation alone does not issue a refund. Deleting the app or Rhythm account does not cancel a Google Play subscription.

Refund requests: request refunds through Google Play. Google decides eligibility and approval under its applicable refund procedures; Rhythm does not promise or initiate an automatic proportional refund. Cancelling renewal does not itself issue a refund. Pro follows the subscription entitlement confirmed by Google, including any confirmed refund or revocation. Google Play refund procedures and mandatory consumer rights remain applicable.

Rhythm may offer paid features through Google Play through monthly or annual Pro subscriptions. The planned United States prices are US$3.99 per month and US$39.99 per year. Purchases are available only when the corresponding Google Play products are activated. Prices, taxes, billing periods, introductory offers and available products are displayed by Google Play at the time of purchase and may vary by region.

• Subscriptions: subscriptions may renew automatically unless cancelled through Google Play before the applicable renewal date, subject to Google Play terms.
• Previously purchased one-time Pro access: one-time Pro is no longer offered for new purchases. Valid existing purchases retain their corresponding Pro entitlement, subject to Google Play's purchase and restoration mechanisms.
• AI Premium: AI Premium or other future services are included only when the App and Google Play purchase screen expressly state that they are part of your plan. A Pro purchase does not automatically include future AI Premium services unless expressly stated.
• Refunds: purchases and refunds are processed under Google Play rules and any mandatory rights under applicable law.

We may change the features included in free or paid tiers for future purchases, but we will not intentionally misrepresent the product you are purchasing.

9. Third-party services

Rhythm can interact with services that we do not control, including Android system services, Firebase Authentication, Cloud Firestore, your calendar provider, Android backup/device transfer and Google Play Billing. Those services are governed by their own terms and privacy policies.

Rhythm can use Firebase for optional cloud synchronization, shared calendars, meeting proposals and push notifications, and a Mad Forge Design serverless proxy with Google Routes API when you request a live travel estimate. The route request contains current device coordinates and the event destination. The backend also verifies purchase tokens with Google Play and processes subscription lifecycle notifications. Availability depends on these cloud services and Google Maps Platform coverage. Your use of routing is also subject to the Google Maps Platform Terms and Google Privacy Policy.

10. Acceptable use

You must not use Rhythm to violate law, infringe the rights of others, interfere with the App or Google Play, attempt unauthorized access to another person's data, or use the App in a way that could damage, disable or disrupt its operation.

11. Availability, updates and changes

We may update Rhythm to fix bugs, improve security, add features, maintain compatibility or meet platform and legal requirements. Some updates may change the appearance or operation of the App.

We aim to preserve user data across normal App updates and cloud synchronization, but no software or online service can guarantee uninterrupted, conflict-free or error-free operation. For concurrent edits of the same record, the last successfully synchronized write may prevail. You should maintain an independent manual export and appropriate backups for information that is important to you, including through your calendar provider where applicable.

12. Intellectual property

Rhythm, its original design, branding, graphics, software and documentation are owned by Mad Forge Design or its licensors and are protected by applicable intellectual-property laws. Open-source components remain subject to their respective licenses. See Open Source Licenses.

© 2026 Rhythm Adaptive Calendar. All rights reserved.

13. Disclaimer of warranties

To the maximum extent permitted by applicable law, Rhythm is provided on an "as is" and "as available" basis. We do not promise that every feature will always be uninterrupted, error-free or suitable for every purpose. This disclaimer does not remove statutory warranties or consumer rights that cannot legally be excluded.

14. Limitation of liability

To the maximum extent permitted by applicable law, Mad Forge Design is not liable for indirect, incidental or consequential losses arising solely from reliance on estimated travel times, missed notifications, inaccurate user-entered information, third-party calendar synchronization or third-party service interruptions.

Nothing in these Terms excludes or limits liability where doing so would be unlawful, including liability that cannot be excluded under mandatory consumer protection law.

15. Termination

You may stop using Rhythm at any time and uninstall the App. We may stop distributing or supporting a version of the App where reasonably necessary, including for security, legal or platform reasons. Google Play purchase and subscription rights remain subject to applicable Google Play terms and mandatory law.

16. Governing law

These Terms are governed by the laws of the Republic of Croatia, without limiting any mandatory consumer protections that apply to you under the law of your country of residence or applicable European Union law.

17. Changes to these Terms

We may update these Terms when the App, paid plans, platform requirements or applicable law change. The latest version will be published on this page. Where required, material changes will also be communicated in the App or through the relevant store process.

18. Contact

Rhythm Adaptive Calendar is created by Mad Forge Design.

Support: support@rhythmcalendar.com
Privacy: privacy@rhythmcalendar.com