Last updated: October 2, 2026.
Public URL: https://legal-site-gilt-ten.vercel.app/en/privacy
About us
Matetic is an educational mathematics game intended for ages 6 and up, teenagers and adults. Google Play displays the official content rating for each region. The responsible developer is Tullio Oliveira. Support and privacy contact: valionsuport@gmail.com.
Family experience and age group
An unselected, neutral screen asks for an age group at first launch. Only the category is stored on this device, not a birthday or exact age.
Children, teenagers and people who do not disclose their age use the local experience. Exercises, campaign, training, profile, achievements and the game-coin shop stay on the device. Matetic does not initialize Firebase or Google sign-in, submit profiles to public rankings or synchronize progress in this experience. Playing does not require an online account. Uninstalling or clearing app data may erase local progress.
The current version provides accounts, cloud synchronization and online rankings only in the adult experience. On Android, in addition to selecting age 18 or older, we query the age range shared by Google Play using the Play Age Signals API. Google Play presents its sharing choice when needed. If the range indicates a minor, is not shared or cannot be queried, the game remains local and can still be played. Permission is re-evaluated when returning to the app.
We use the store signal only for age-appropriate protection. The decision stays temporarily in device memory: we do not send it to our server, use it for advertising, analytics or profiling, or store the installation identifier or age bounds returned by the API. The in-app selection is not identity verification or parental consent to collect a child's data.
Download, advertising and in-game purchases
Matetic is offered as a one-time paid download through Google Play, at the price shown by the store before installation. Prices depend on the country and currency. Google Play processes payment; the app does not receive card details or payment credentials. Access through testing tracks may follow Google Play's own conditions.
After installation, the app displays no advertising, offers no real-money in-game purchases and integrates no advertising or analytics SDK. It does not use advertising identifiers.
The shop offers fixed bundles of 5 Freeze or Eliminate uses, redeemed exclusively with virtual coins earned within the game. Freeze costs 450 coins and Eliminate costs 550 coins. Redemptions and inventory stay on this device and require no account, card or payment. This version sells no coins, power-ups, subscriptions or ad-free passes. There are no purchased random items or conversion of coins into real money.
Data stored on this device
- Age group, chosen nickname and character.
- Levels, scores, stars, experience, achievements, virtual coins and resources.
- Exercise attempts, answers and mistakes for recommendations and review.
- Language, audio, accessibility, animation and Normal or Hard preferences.
- Foreground screen time for the last seven days, daily limit and family control settings. These stay locally and are not sent to rankings, Firebase or Matetic servers.
- A cryptographic verifier for the parent PIN and information to limit failed attempts. The PIN is not stored in plain text or transmitted off the device.
Family controls and healthy use
The time controls described here are available in version 1.0.42 (code 46) and later. Check your installed version; earlier versions do not include these controls.
In Settings > Game or Account > Parent area, families can see today’s screen time and the last seven days. Only foreground time is counted, excluding background use and a locked screen. Usage history retains seven days only.
For minors and undisclosed ages, the initial limit is 30 minutes per day. This is a product default, not medical advice on screen time. A parent can create a six-digit PIN and choose 15, 30, 45, 60, 90 or 120 minutes. Creating the PIN also applies the limit to adult profiles on this device. Usage is consolidated per device, apart from saves: switching accounts, signing out or clearing one profile does not reset the limit.
A notice shows the active limit and remaining time. At the limit, the app displays a break screen and stops the local match timer. A parent can change the limit using the PIN; time already used is not cleared. The round can continue while the app stays open, but recovery of an ongoing round after terminating the process is not guaranteed. Already saved progress remains.
Control authorization expires after five minutes, leaving the area or moving the app to the background. Five wrong attempts cause a one-minute wait that persists across app restarts. The PIN is not proof of age, identity or consent for online collection of children’s data. It cannot be recovered by email and should be kept safe. These local controls can be removed by clearing all app data through the operating system or uninstalling; we also recommend Android/Google Play supervision tools.
The family experience has no daily-return bonuses, attendance calendar, login streaks or chests for continuous match sequences. Learning and level-result rewards remain. We encourage agreed schedules, breaks and activities away from screens. Playing every day is not necessary.
Guidance is freely available, including before purchase: https://legal-site-gilt-ten.vercel.app/en/family
Data transmitted in the adult experience
- Firebase account identifier, including anonymous authentication for an online guest.
- Email and authentication information when email or Google sign-in is selected. Firebase Authentication handles passwords; Matetic's backend does not store passwords.
- Nickname, progress, scores, match answers and statistics needed for synchronization and verified rankings.
- Minimal technical request and error information for operation and security. Hosting providers may process IP addresses and network information to serve connections. Matetic does not use this information for advertising or tracking across apps.
Purposes
We use data to provide exercises and recommendations within the game, save progress on this device, authenticate and link accounts, validate scores, display achievements and rankings, record rewards and prevent fraud or duplicates. Online services receive progress summaries; full restoration of a save on another device is not currently available. We do not sell personal data or use it for personalized advertising.
Adult public rankings display nicknames and game results. There is no chat or direct messaging. Do not use a full name, email, phone number or address as a nickname. Account credentials are not published in rankings.
Providers and disclosure
- Firebase/Google Cloud: authentication and storage of online accounts, progress and rankings.
- Cloudflare Workers and D1: match verification and account deletion.
- Google Play: distribution, processing of the purchase to download the app and adult-experience age-range queries as described above. Google Play handles download payments under its own policies.
Providers process data to supply these services under their policies and agreements. Processing may occur in other countries. Nickname and score publication follows an adult's participation in public rankings. We send no data to advertising networks.
Data we do not request
The app does not request location, contacts, camera, microphone, photos, videos, personal files or phone numbers. It does not send user push notifications.
Security and retention
Online services use HTTPS, authentication and access controls. No security measure removes every risk.
Local progress remains until cleared. Online account data remains while the account exists. Account deletion removes the profile, remote progress, ranking and Firebase access. A technical deletion marker may remain to prevent fraud or improper recreation of deleted records. They do not retain the profile nickname or email. Infrastructure operational logs follow providers' retention periods and are not used for advertising.
Account and data deletion
In the app, open Settings > Account > Delete account and data. Local deletion clears progress on this device. Online deletion needs a connection for server confirmation; interrupted requests may continue on the server.
If you cannot access the app, email valionsuport@gmail.com. Provide the account email, if any, or the available technical identifier. We may confirm ownership. Do not send passwords, identity documents or card details.
Public instructions: https://legal-site-gilt-ten.vercel.app/en/account-deletion
Children and guardians
We recommend guardian supervision, including for the download purchase, and nicknames without personal information. After installation, educational content remains available locally without advertising or real-money in-game purchases. An adult's presence does not enable online data collection from a child. Any future such functionality would require its own consent and control mechanisms.
Changes and contact
We update this policy when data practices change. The date above identifies the revision. For questions, access, corrections or deletion: valionsuport@gmail.com.