STELO Terms of Use
Effective date: October 3, 2026
These terms describe your use of STELO, provided by Seokyoung You, operating as Quartz Labs ("we", "us"). Read them together with the Privacy Policy. If you do not agree, do not use STELO.
1. App license and eligibility
Your license to the iOS app is governed by Apple's Standard Licensed Application End User License Agreement (EULA), unless a different license is expressly supplied through the App Store. These terms supplement that license for STELO's services and purchases. Mandatory consumer rights remain unaffected; if these terms conflict with a mandatory rule or the applicable App Store license, that rule or license controls.
Use STELO only on devices you are authorized to manage. You must meet the age and consent requirements that apply to you. The service is not directed to children under 13; minors who can lawfully use it should have a parent or guardian's permission where required.
2. What STELO does
STELO helps you configure app access for activities such as reading, writing, development, and rest. It uses Apple's Screen Time permission and system blocking features. It does not remove apps from your device, promise to hide them from the Home Screen or App Library, or automatically synchronize Apple Focus settings.
The default mode applies no STELO restrictions. You can end an activity mode to remove the restrictions applied by STELO. Restrictions from other apps, parental controls, device management, or iOS itself are outside STELO's control.
Features depend on your iOS version, permissions, device, and app version. The current app targets iOS 18 or later. System exceptions and operating-system limits can affect which apps or websites can be restricted.
STELO is a personal productivity tool. It is not a medical treatment, emergency service, security boundary, or tamper-proof parental-control product. It does not guarantee a particular amount of focus, reduced screen time, or uninterrupted enforcement. Keep a way to access essential communications and services.
3. Free features, Pro, and pricing
Some features are free and others may require STELO Pro. The available features, eligibility, price, billing period, and any introductory offer are shown in the app and Apple's purchase confirmation before you authorize payment. Prices vary by region and may change subject to Apple's rules and applicable law. Website descriptions do not override the offer shown at purchase.
Monthly and annual plans, when offered, are auto-renewing subscriptions. Apple charges your Apple Account and handles renewal. Cancel before renewal; for a trial, cancel at least 24 hours before it ends if you do not want to be charged. A trial is offered only where available and eligible, and converts to the displayed paid plan unless canceled. See Apple's subscription cancellation guidance.
A Lifetime purchase, when offered, is a one-time purchase without automatic renewal for the Pro access described at purchase, for the supported lifetime of STELO. It does not promise perpetual compatibility, an indefinitely operating service, every future separate product, or benefits that were not included in the offer. Your statutory rights continue to apply.
4. Cancellation, refunds, and restoration
Manage or cancel subscriptions through Apple's subscription management. Removing STELO, ending a mode, revoking Screen Time permission, or sending a privacy deletion request does not cancel a subscription. Access generally continues for the remaining paid period, subject to Apple's treatment of refunds, revocations, and trials.
Use Restore Purchases in STELO with the Apple Account used for the original purchase to restore eligible access. An internet connection may be required. Refund requests are handled through Apple's refund service and applicable consumer law. These terms do not remove any right to a refund or other remedy you may have by law.
RevenueCat helps validate purchases and maintain access. We do not ask you to send payment card details by email. If access is missing, contact support with the product and issue, omitting sensitive payment information.
5. Your responsibilities
Use the app lawfully and do not use it to control another person's device without authorization. Do not interfere with the service, attempt to access other users' information, abuse support channels, or bypass purchase verification. Rights expressly allowed by law, including applicable software-interoperability rights, are not restricted by these terms.
You are responsible for choosing suitable app rules and reviewing them before relying on a mode. Your activity settings are stored locally; deleting the app or changing devices may remove them. STELO does not promise to recover local settings it does not hold.
6. Availability and changes
We may maintain, improve, or change STELO as supported systems and APIs evolve. Beta or TestFlight versions may have incomplete features or defects. Descriptions of planned features are not a commitment that they are available in your version.
We will give notice of material service changes or discontinuation where required and honor applicable obligations relating to paid access. We do not guarantee continuous availability or compatibility with every future iOS release. Network, Apple, and other service interruptions may affect purchases, restoration, or external pages.
7. Intellectual property and third-party services
STELO's code, original artwork, character, and branding belong to their respective rights holders. Permission to use the app does not transfer ownership or grant rights to redistribute its artwork or branding. Apple and other third-party names remain their owners' trademarks.
Apple's platform, App Store, and Screen Time services have their own rules. External websites have their own policies. Apple is not the provider of STELO's support service. Contact Quartz Labs about the app and Apple about App Store billing where appropriate.
8. Warranties, responsibility, and disputes
To the extent permitted by law, STELO is provided on an as-available basis without a promise that it is error-free or will achieve a particular outcome. We are not responsible for failures beyond our reasonable control. Nothing here excludes or limits liability that cannot lawfully be excluded or limited, or removes mandatory consumer protections.
Contact us first if something goes wrong so we can try to resolve it. These terms do not require mandatory arbitration or waive your right to bring a complaint to a consumer authority or competent court. Applicable law determines your mandatory rights and the available forum.
9. Changes and contact
We may update these terms and revise the effective date. For material changes affecting your rights, we will provide notice and seek agreement where required by law. Changes do not retroactively remove rights attached to a purchase.
Seokyoung You 路 Quartz Labs