Teumbak

Terms of use

Last updated: September 9, 2026

1. Operator and scope

These terms govern use of Teumbak, provided by (주)아이비알도스 (“IBRDOS,” “we,” or “us”). Contact dev@ibrdos.com about the service or these terms. Our Privacy Policy explains information handling.

2. Service and license

Teumbak displays time and plays signals according to your chosen work, rest, preparation and round settings. You may use its preset, history and preference features as provided. No account is required. There is no paid subscription or in-app purchase. Charges from your carrier, device or app-store provider remain subject to that provider's terms.

We grant a nonexclusive right to use the app for its ordinary personal purpose. This does not transfer ownership of the app or its marks. Open-source components retain their own licenses. Mandatory app-store terms and rights under applicable law remain in effect.

3. Timer and exercise limitations

Teumbak is not a medical device. It is not intended to diagnose, treat, cure or prevent a medical condition. Consult a healthcare professional for medical advice, diagnosis or treatment. Example presets illustrate time settings; they are not exercise prescriptions tailored to your health.

Choose settings appropriate for your circumstances and stop an activity when needed. Sound, vibration and display behavior depend on volume, audio route, the operating system, power settings and whether the app has been terminated. With sound disabled, the timer pauses when the app backgrounds. A session is not restored after the app process terminates. Check alerts with a short timer before use. Do not use Teumbak as the sole timing or alarm mechanism for a life-critical or safety-critical task. This provision does not exclude liability for our fault where the law imposes it.

4. Local records

Presets, completed-session history and preferences are stored on the device. We do not keep server recovery copies. Deletion, reset, device changes and operating-system backup behavior can affect whether records are lost or restored. History retains the latest 500 completed sessions. App data reset deletes user presets and history, recreates example presets and defaults, and keeps your chosen language. Deleted records cannot be recovered. Responsibility for loss caused by our fault is determined by applicable law.

5. Advertising and external services

Teumbak may display banners on the home or completion screen. Advertising is not displayed while a workout is preparing, running or paused. Privacy choices are explained in the Privacy Policy. Tapping an ad may open an external app or website, whose terms govern your use or transactions there. Displaying an ad does not mean we guarantee its product's quality or effectiveness.

6. Misuse

Do not compromise the app's or another person's security, distribute unauthorized modified copies, manipulate advertising impressions or clicks, or infringe others' rights. This provision does not restrict analysis or interoperability rights allowed by law or rights granted by open-source licenses.

7. Updates, availability and changes

We may update Teumbak to fix faults, improve security, maintain operating-system compatibility or improve the product. We provide advance notice in the app or public information pages of significant feature discontinuation or unfavorable changes to these terms, and follow applicable notice and consent requirements. Urgent security measures or unexpected outages may prevent advance notice; we explain them afterward where practicable. Any future paid feature will disclose its price and additional terms before you choose to purchase it.

8. Responsibility, disputes and ending use

Each party is responsible for harm attributable to its conduct under applicable law. These terms do not exclude liability for our intentional misconduct or gross negligence, other liability that cannot lawfully be excluded, or mandatory consumer rights.

You may stop using Teumbak and delete its local data at any time. You may contact dev@ibrdos.com to try to resolve a concern. Korean law governs interpretation subject to mandatory consumer protections and jurisdiction rules that apply to you. These terms do not impose exclusive unilateral venue or mandatory arbitration.