Document · Privacy

Privacy policy

Lumen Catch · Necessary
Last updated: September 15, 2026

Who we are

Lumen Catch is a game for Android and iOS developed and published by Necessary (“we”, “us”). This policy explains what data the game and the website lumen-catch.web.app handle, why, and what your rights are.

Necessary is the controller of the personal data described here, except where this policy says that another company, such as Google or Apple, handles the data as an independent controller. For privacy matters, email necessary.mob@gmail.com.

Data that stays on your device

To work, the game stores on your device:

High score

the highest score you have ever made.

Catalog

the species you have sighted, captured or avoided, with counts, the date and match time of the first sample, and which entries you haven't opened yet.

Settings

sound, vibration, language, no-flash mode, and whether you have answered the lights warning shown the first time you open the game.

Purchase

whether you bought Remove ads, so the game doesn't show ads.

Ad choices

your answers to the consent message and to the tracking request, stored by Google's consent tool and by your device's operating system.

This data is not sent to us. The game has no server, so we can't see your high score, catalog or settings, and we can't link any of it to you.

Your answer to the lights warning is only used to turn no-flash mode on or off. It is not a diagnosis, it never leaves your device, and you can change it at any time in Settings.

Android and iOS may include this data in your Google account or iCloud backup, depending on your device settings. That backup belongs to you and is kept by Google or Apple. We have no access to it.

To delete it: uninstall the game or clear the app's data in your device settings. Your high score, catalog and settings are deleted and can't be recovered. The Remove ads purchase is tied to your store account and comes back with Restore purchases.

Ads

Lumen Catch is free and supported by ads from Google AdMob, a Google service. Ads appear at two moments:

• To continue: when the collector's integrity reaches zero, you can choose to watch an ad to continue the match. It's optional.
• Between matches: when you leave the results screen, with a minimum interval between one ad and the next.

There are never ads during a match.

To show and measure ads, the Google Mobile Ads SDK, which is part of the game, collects and sends Google data such as:

• your device's advertising identifier: the advertising ID on Android and, only if you allow it, the IDFA on iOS;
• your IP address, which may indicate your approximate location, such as city or region;
• device and app information, such as model, operating system, language and game version;
• interactions with ads, such as which ones were shown, tapped or watched to the end;
• performance and crash data from the SDK itself.

Google uses this data to show ads, limit how often you see the same ad, measure results, prevent fraud and abuse and, when you allow it, personalize ads based on your interests. In doing so, Google acts as an independent controller, under the Google Privacy Policy and the page How Google uses information from sites or apps that use our services.

We don't receive this data. AdMob only shows us aggregated reports, such as the number of ads shown and revenue, which don't identify anyone.

After you buy Remove ads, the game stops requesting ads from Google, and continuing a match no longer requires an ad.

Consent and your choices

Before loading any ad, the game checks with Google whether your region requires consent:

• European Economic Area, United Kingdom and Switzerland: Google's consent message (User Messaging Platform) appears, compatible with the IAB Transparency & Consent Framework. You can accept, decline or choose by purpose. If you decline, ads may be limited or non-personalized.
• US states with privacy laws, such as California: the game offers the option to opt out of the sale or sharing of your data for personalized ads.
• iOS: the game asks for your permission through App Tracking Transparency. If you don't allow it, the IDFA is not accessed.
• Other regions, including Brazil: ads may be personalized using the advertising identifier, which you control in your device settings.

You can change your choices at any time:

• In the game: Settings › Ad privacy, in regions where the consent message is shown.
• On Android: in your device settings, in the ads section, you can reset or delete the advertising ID.
• On iOS: Settings › Privacy & Security › Tracking.
• In your Google account: My Ad Center lets you control how Google ads are personalized.

In-app purchases

Remove ads is a one-time purchase, processed by Google Play on Android or the App Store on iOS. Payment and your account details stay with Google or Apple, under the Google Privacy Policy and the Apple Privacy Policy. We never see your card number or other payment details.

To unlock the purchase, and when you tap Restore purchases, the game checks with the store from your device and receives only confirmation that the purchase exists.

The stores send us sales reports with information such as product, price, date, and country or region of purchase. We use these reports for accounting and tax obligations.

This website

This website is hosted on Firebase Hosting, by Google. To deliver pages and protect the site from abuse, Google logs technical data for each visit, such as IP address, browser and page visited, as described in Firebase's privacy information.

The site doesn't use cookies or analytics tools and has no forms. Fonts are served by the site itself, with no third-party services.

When you email us

If you email us, we receive your address and whatever you write. We use it only to reply, and keep it as long as needed to resolve the matter and meet legal obligations.

What we don't do

• We don't ask for your name, email, phone number or any sign-up in the game.
• We don't access your precise location, contacts, photos, camera or microphone.
• We don't use usage analytics or crash reporting tools. The only third-party services in the game are ads (section 3) and store purchases (section 5).
• We don't sell your data. In some US states, the law calls using identifiers for personalized ads a “sale” or “sharing”. In those places, you can opt out, as explained in section 4.

Legal bases

Under Brazil's General Data Protection Law (LGPD), the EU General Data Protection Regulation (GDPR) and other applicable laws, the legal bases are:

• Consent: personalized ads and access to device information where the law requires consent, and tracking on iOS.
• Legitimate interests: showing non-personalized ads to keep the game free, measuring ads, preventing fraud, keeping this site online and secure, and replying to people who email us.
• Performance of a contract: unlocking and restoring the Remove ads purchase.
• Legal obligation: keeping the sales records required by tax law.

How long we keep data

• Data on your device: until you uninstall the game or clear the app's data.
• Data collected by Google, through ads and this site: for the periods set in Google's retention policies.
• Sales reports: for the period required by tax law.
• Emails: as long as needed to resolve the matter and meet legal obligations.

International transfers

Google and Apple may process data on servers outside your country, including in the United States. In those cases, they use the safeguards provided by law, such as standard contractual clauses.

Your rights

Depending on the law in your country, you can ask for confirmation that we process your data, access, correction, anonymization, portability and deletion, information about who we share it with, withdrawal of consent, and objection to processing. You can also complain to a data protection authority: in Brazil, the ANPD; elsewhere, your local authority.

Since we don't keep data that identifies you, most of these rights are in your hands:

• Game data: clear the app's data or uninstall the game.
• Ad data: use the options in section 4 and Google's tools.
• Purchase data: contact Google Play or the App Store.

For any other request, email necessary.mob@gmail.com. We reply within 15 days.

Children

Lumen Catch is not directed at children under 13, and we don't knowingly collect data from children. If you are a parent or guardian and believe a child has sent us personal data, for example by email, contact us and we will delete it.

Security

Game data is kept in the app's private storage, protected by your device's operating system. Communication between the game, Google and the stores is encrypted. No system is completely secure, but since we have no server or database, we don't store game data that could leak from a system of ours.

Changes to this policy

If this policy changes, we update the date at the top of this page. If the change is significant, such as a new service that collects data, we will announce it in the game's update notes before it takes effect.

Contact

Necessary
Publisher of Lumen Catch and contact for personal data requests
necessary.mob@gmail.com

This policy is also available in Portuguese and Spanish. If the versions differ, the Portuguese version prevails.