Privacy Policy
Last updated: July 29, 2026
Last updated: July 29, 2026
This Privacy Policy explains how Device Optical Aid ("DOA", "we", "us") collects, uses, stores, and protects your personal data when you use our desktop application and website at deviceopticalaid.com.
DOA is operated by Cedric Julien .E, an individual operator based in Douala, Cameroon. For the purposes of the General Data Protection Regulation (GDPR), Cedric Julien .E is the data controller.
We comply with applicable data protection laws including the EU General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA), and other applicable regional regulations. By using DOA, you acknowledge this policy. If you do not agree, please do not use the application.
If you choose not to provide certain data. An email address is needed to create an account, and prescription values are needed for the display correction to work. Without them those specific features cannot function. Everything else is optional: you can use DOA without submitting feedback, and declining optional data never reduces your access or changes your price.
Under GDPR Article 6, we process your personal data only where a lawful basis exists. The following table identifies the basis for each processing activity:
Your optical prescription values are data concerning health and are treated as a special category of personal data under GDPR Article 9. We process them on the basis of your explicit consent (Art. 9(2)(a)), which you give by choosing to enter your prescription so DOA can apply the corresponding display adjustment. You can withdraw that consent at any time by deleting the prescription or your account, which stops further processing. We do not use prescription data for any purpose other than providing the adjustment you requested.
DOA captures your screen in real time to apply visual correction. This is the core technical mechanism of the product. Here is exactly what happens and what does not happen:
What DOA never captures: Windows system UI, login screens, UAC (User Account Control) prompts, and certain protected application windows are excluded from capture by the operating system automatically, not merely by policy. These exclusions are enforced at the OS level and cannot be overridden by DOA.
We do not use your data for advertising, behavioral profiling, or any purpose beyond what is described in this policy.
In the event of a data breach that affects your personal data, we will notify affected users by email within 72 hours of becoming aware of the breach, in accordance with GDPR Article 33. The notification will describe the nature of the breach, data affected, likely consequences, and steps taken to address it.
DOA uses the following third-party services. Each acts as a data processor on our behalf, processing data only on our instructions and subject to their own data processing agreements:
We do not sell, rent, trade, or share your personal data with advertisers, data brokers, or any third party not listed above. We do not permit any third party to use your data for their own purposes.
With your explicit opt-in consent, DOA may collect anonymized aggregate data including prescription distribution ranges and correction quality patterns across the user base. This data:
You will always be asked clearly before this data is collected. You can withdraw consent and opt out at any time from the app settings. Withdrawing consent does not affect data already aggregated, as it is by then unattributable.
The DOA website sets no advertising cookies, no cross-site tracking cookies, and no cookies that identify you personally. There is no cookie banner because there is nothing being set that requires consent.
Privacy-friendly analytics. We use Vercel Web Analytics to see how many people visit, which pages they read, and roughly which country and device type they came from. It is cookieless: it sets no cookies, stores no identifier on your device, builds no profile of you, and cannot follow you to other websites. The data is aggregated and we cannot identify an individual visitor from it. We also count clicks on the download button so we know whether the site is doing its job. That count is anonymous and is not linked to any account.
Hosting logs. Our host processes standard request data, including your IP address, transiently in order to deliver the site securely and prevent abuse. We do not use these logs to identify or track visitors, and we do not combine them with account data.
Session state for signed-in users on the web interface may use browser localStorage. This is functional only and is not shared with any third party.
If we ever introduce tracking that requires consent, we will update this section and present a consent mechanism before any such tracking begins.
If you are located in the European Economic Area (EEA), the United Kingdom, or Switzerland, you have the following rights under the GDPR:
To exercise any of these rights, contact us at support@deviceopticalaid.com. We will respond within 30 days. Account deletion is also available directly within the application.
If you are a California resident, the California Consumer Privacy Act (CCPA) grants you the following rights:
Categories of personal information collected: identifiers (email, user ID), commercial information (subscription status), internet or electronic network activity (session duration, feature usage), and inferences drawn to apply visual correction.
Sensitive personal information: Your optical prescription values are personal information concerning your health, and we treat them as sensitive personal information under the CPRA. We use them for one purpose only: to apply the display adjustment you have asked DOA to perform. That is a use permitted under Cal. Civ. Code § 1798.121, so there is no further use to limit. We do not use or disclose your prescription data to infer characteristics about you, for advertising, or for any purpose beyond providing the service. You may still request that we limit, delete, or stop processing it at any time by contacting us.
Because we do not sell or share personal information for cross-context behavioral advertising, there is nothing for an opt-out preference signal to act on. Where the DOA website does not set tracking cookies, no Global Privacy Control (GPC) or "Do Not Track" signal changes what we collect. If this ever changes, we will honor recognized opt-out preference signals as required by the CPRA.
To submit a CCPA request, contact us at support@deviceopticalaid.com with the subject line "CCPA Request". We will respond within 45 days. We will not discriminate against you for submitting a request, and you may use an authorized agent to submit one on your behalf.
We do not make decisions about you that produce legal effects, or similarly significant effects, based solely on automated processing within the meaning of GDPR Article 22.
DOA does apply your prescription values automatically to calculate a display adjustment. That is a calculation you have explicitly asked for, it changes only how your own screen looks, and it reaches no decision about you: it does not score, rank, assess, or classify you, and it has no bearing on pricing, eligibility, or any right or entitlement.
We do not profile you for advertising, and we do not combine your data with data from other sources to infer characteristics about you.
Your data may be stored and processed in countries other than your own, including the United States, where Firebase and Creem infrastructure operates. For transfers from the EEA to countries without an adequacy decision:
By using DOA, you acknowledge that your data may be transferred to and processed in these countries under the safeguards described above.
DOA is an accessibility tool intended for adults. It is not directed at or intended for children under the age of 13 (or under the applicable age of digital consent in your country, which is up to 16 in parts of the European Union). Creating an account requires confirming you meet this minimum age, and we do not knowingly collect, store, or process personal information, including prescription data, from anyone below it.
If we learn that we have collected personal information from a child below the applicable age, we will terminate the account and delete the associated data promptly. If you are a parent or guardian and believe your child has provided personal information to us, please contact us at support@deviceopticalaid.com and we will delete it. This approach is consistent with the U.S. Children's Online Privacy Protection Act (COPPA) and Article 8 of the GDPR.
We may update this Privacy Policy as the product evolves. When we make significant changes, registered users will be notified by email at least 14 days before the changes take effect. The "Last Updated" date at the top of this page always reflects the most recent revision. Continued use of DOA after changes take effect constitutes acceptance of the revised policy.
We will never make changes that retroactively reduce your privacy rights without explicit re-consent where required by law.
For any questions, requests, or concerns about this Privacy Policy or your personal data:
EU residents also have the right to lodge a complaint directly with their national supervisory authority if they believe their data protection rights have been violated. For legal terms governing use of the application, see our Terms of Service.