Legal · Terms

Terms of Service

App: Lumo Browser Effective: 2026-08-20 Last Updated: 2026-08-20

These Terms of Service ("Terms") govern your use of the Lumo Browser mobile application ("the App"), operated by Tranquil Mind Technology JSC ("we", "us", "our"). By downloading or using the App, you agree to these Terms and to our Privacy Policy (https://policy.tranquilmind.co/lumo-browser/privacy). If you do not agree, do not use the App.

1. Eligibility

You must be at least 16 years old — or older, if your country sets a higher age of digital consent — to use the App. If you are a minor in your jurisdiction, you may use the App only with the involvement of a parent or guardian. The App is a general-audience utility that gives access to the open internet; it is not designed for, or directed to, children.

2. Licence

We grant you a personal, limited, non-exclusive, non-transferable, revocable licence to install and use the App on devices you own or control, for your own non-commercial use.

You may not copy, modify, translate, decompile, reverse-engineer, disassemble, rent, lease, sublicense, resell, or create derivative works from the App, except to the extent that applicable law expressly permits it. All rights not expressly granted are reserved.

3. The service

Lumo Browser is a mobile web browser. It lets you open and manage multiple tabs, search or enter addresses, reach popular sites through built-in shortcut tiles, block web advertising, trackers and pop-ups with an on-device blocker, view the amount of blocked content and the protection timer, choose from 25 interface languages, and register the App as a handler for web links so that you can select it as your default browser in Android Settings.

The App does not host, produce, or control any web content. Availability of specific features may vary by device, Android version, and region, and we may modify, suspend, or discontinue any part of the App at any time.

The built-in blocker is best-effort. It relies on a curated on-device list of advertising and tracking domains. It reduces but cannot eliminate advertising, pop-ups and tracking on every website, and some sites may not display or function correctly while blocking is enabled. We make no guarantee that any specific advertisement, pop-up, or tracker will be blocked.

4. No accounts, and your data

The App has no user account, login, or profile. Your tabs, cookies, site data and preferences are stored locally on your device and are not uploaded to us. You are responsible for the data stored on your device; clearing the App's storage or uninstalling the App permanently deletes it. See the Privacy Policy for what limited information is collected automatically.

5. Advertising and subscriptions

The App is free to download. The free version is supported by advertising (banner, native and full-screen formats) served by Google AdMob and its mediation partners. Where required by law, the App asks for your consent before showing personalised advertising.

Premium subscriptions. The App offers optional auto-renewing Premium subscriptions, currently on yearly, monthly and weekly terms, sold through Google Play Billing. Premium removes in-app advertising. Prices, currencies, and any introductory or free-trial offer attached to an eligible plan are configured by us in Google Play, and are set and displayed by Google Play for your region. They may change; the price and offer shown in the App at the time of purchase applies.

Payment is charged to your Google Play account at confirmation of purchase, or at the end of any free-trial period.
Subscriptions renew automatically for the same period at the then-current price unless you cancel at least 24 hours before the end of the current period.
Manage or cancel a subscription in Google Play → Profile → Payments & subscriptions → Subscriptions. Uninstalling the App does not cancel a subscription.
If you cancel during a free trial, you keep access until the trial ends and are not charged; any unused part of a free trial is forfeited when you purchase a subscription.
Refunds are handled by Google Play under its refund policy and by your mandatory statutory consumer rights. We do not process payments and cannot issue refunds directly.
You may restore an existing subscription on a new device using the same Google account through the restore option in the App.

6. Acceptable use

You agree not to use the App to:

break any applicable law or regulation, or infringe anyone's intellectual property, privacy, or other rights;
access, download, or distribute unlawful material, including any material that sexually exploits or endangers minors;
interfere with, disrupt, overload, or attempt to gain unauthorised access to the App, our providers' systems, or any website;
circumvent security measures, paywalls, access controls, or the advertising that supports the free version, or tamper with billing or subscription verification;
run bots, scrapers, or automated tools through the App, or use it to send spam or malware;
use the App for any commercial redistribution of its functionality.

We may suspend or terminate your access if you breach these Terms.

7. Intellectual property

The App, its source code, design, user interface, artwork, icons, and the "Lumo Browser" name and logo are owned by Tranquil Mind Technology JSC or its licensors and are protected by intellectual property laws.

The App uses open-source components under their respective licences, and an on-device blocklist derived from publicly available filter lists. All third-party names, logos, and trademarks — including those of any website reachable through the App or shown on a shortcut tile — are the property of their respective owners; their appearance does not imply any affiliation with, sponsorship of, or endorsement by those owners.

8. Third-party services and content

The App uses third-party services for advertising, analytics, crash reporting, marketing attribution, and payments, each governed by its own terms and privacy policy. It also gives you access to websites and online services operated by third parties.

We do not create, own, endorse, or control third-party content, and we are not responsible for it, for its availability, or for any transaction you enter into with a third party. Your use of any website reached through the App is subject to that site's own terms.

9. Disclaimers

The App 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.

We do not warrant that the App will be uninterrupted, timely, secure, or error-free, that blocking will be complete, that every website will render correctly, or that defects will be corrected. Nothing in the App constitutes professional advice. Some jurisdictions do not allow the exclusion of certain warranties, so some of these exclusions may not apply to you.

The App is not a VPN or proxy service. It does not encrypt, tunnel, or anonymise your network traffic beyond the encryption a website itself provides, and it does not hide your IP address from the websites you visit or from your network operator. Do not rely on it for anonymity.

10. Limitation of liability

To the maximum extent permitted by law, Tranquil Mind Technology JSC and its officers, employees, and suppliers will not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of data, profits, revenue, or goodwill, arising out of or in connection with your use of the App.

Our total aggregate liability for all claims relating to the App is limited to the greater of (a) the amount you paid us for the App in the 12 months before the event giving rise to the claim, or (b) USD 50.

Some jurisdictions do not allow these limitations, so they may not apply to you; nothing here limits liability that cannot be limited by law.

11. Indemnification

You agree to indemnify and hold harmless Tranquil Mind Technology JSC from any claim, demand, loss, or expense (including reasonable legal fees) arising from your misuse of the App, your breach of these Terms, or your violation of any law or third-party right.

12. Termination

You may stop using the App at any time by uninstalling it. We may suspend or terminate your access to the App, or discontinue the App, at any time, including for breach of these Terms. Sections on intellectual property, disclaimers, limitation of liability, indemnification, and governing law survive termination.

13. Changes to these Terms

We may update these Terms from time to time. Material changes will be posted on this page with a new "Last updated" date. Continued use of the App after an update means you accept the revised Terms. If you do not agree, stop using the App and uninstall it.

14. Governing law and disputes

These Terms are governed by the laws of Vietnam, without regard to conflict-of-law rules. The courts of Hanoi, Vietnam have exclusive jurisdiction over any dispute, except where mandatory consumer-protection law in your country of residence gives you the right to bring proceedings, or requires the application of local law, in which case those rights are preserved.

15. General

If any provision of these Terms is held invalid or unenforceable, the remaining provisions stay in force. Our failure to enforce any right is not a waiver of it. These Terms, together with the Privacy Policy, are the entire agreement between you and us regarding the App. You may not assign these Terms; we may assign them in connection with a merger, acquisition, or asset sale.

Distribution through Google Play is additionally subject to the Google Play Terms of Service. Google is not a party to these Terms and has no responsibility for the App.

16. Contact

Tranquil Mind Technology JSC No. 3, Alley 98, Vu Trong Phung Street, Thanh Xuan Ward, Hanoi City, Vietnam Email: contact@tranquilmind.co