Lexinum ("we," "our," or "us") is an app of word games and number games: Lexle, Sudoku, Word Duel and Bingo. This Privacy Policy explains what information we collect when you use the Lexinum app and the lexinum.org website (together, the "App"), how we use it, who receives it and what choices you have.
If you do not agree with this Privacy Policy, please do not use the App.
1. Information We Collect
1.1 Account Information
You can play as a guest or sign in.
Guest: we create an anonymous account with a random account ID. We do not receive your name or email address
Email sign-in: your email address and a password. The password is handled by our authentication provider; we never see or store it in readable form
Google or Apple sign-in: the email address and account identifier that Google or Apple share with us. With Apple you may choose to hide your real address behind a relay address
Profile: the display name you choose, an avatar picked from a built-in set, a friend code we generate for you, and whether you want notifications. We do not ask for your real name, and Lexinum has no profile photos
1.2 Gameplay Information
Daily Challenge: your guesses and result for the day, and your leaderboard entry
Online matches: the matches you create or join, your moves, results, and when you leave a match or switch away from the app during one
Rankings: your rating and win/loss record in each ranked game
Game recordings: for finished games, a timeline of what happened in the game (for example each guess or placed number and when it was made), used to show post-game analysis and head-to-head comparisons
Word reports: when you report a word as missing or as too obscure, the word and your vote
Custom themes: the names and colours of themes you create
1.3 Friends
Your friends list, the friend requests you send and receive, and the players you have blocked. We do not read your device's contacts.
1.4 Device and Technical Information
Notification token: if you allow notifications, an identifier that lets us send them to your device, and whether the device is Android or iOS
Usage data: on mobile, analytics events such as app opens, sessions, and use of the Premium screen and purchases, together with standard information collected by the analytics software (an app installation identifier, device model, operating system and app version, language, approximate region derived from the IP address)
Crash reports: on mobile, when the app crashes or hits an unexpected error: the error details, device model, operating system version and your account ID
Server logs: our hosting providers process your IP address when your device talks to our servers
1.5 Information That Stays on Your Device
Personal statistics ("Your progress"): the detailed history used to calculate your statistics is stored only on your device. It is not uploaded to us
Settings and counters: your language, theme and game settings, and daily counters such as how many free games you have played today
Downloaded dictionaries
This information is lost if you uninstall the app or clear its data.
1.6 Device Permissions
Camera: only when you scan a QR code, for example to join a challenge. The image is processed on your device and is not stored or sent to us
Local network: only to find players on the same Wi-Fi network for a nearby game
Notifications: to tell you about your turn, a match result or a friend request
1.7 What We Do Not Collect
We do not collect your precise location, your contacts, your photos or files, or your payment card details.
2. How We Use Your Information
To run the games: create your account, save and validate results, run online matches, calculate rankings and leaderboards, and keep your account in sync across your devices
To connect you with other players: friends, invitations and the lobby
To notify you: push notifications about your matches and friend requests, and account emails such as a password reset. We do not send marketing emails
To provide Premium: see section 6
To show ads in the free version: see section 4
To keep play fair and the service secure: detect cheating and abuse, and enforce our Terms of Service
To fix and improve the App: diagnose crashes, correct dictionaries using word reports, and understand how features are used
3. What Other Players Can See
Important: We do not sell your personal information.
Lexinum is a multiplayer game, so some information is visible to other players:
Everyone signed in: your display name and avatar, your position and result on the Daily Challenge leaderboard, your rating on the rank board, public challenges you open in the lobby, and whether your account has Premium
Your opponents: your moves and result in the match, and its post-game comparison
Your friends: that you are on their friends list, and the challenges you open for friends
Anyone you give it to: your friend code, and the invite codes, links and QR codes you share
Your email address is never shown to other players. Choose a display name that does not identify you if you prefer to stay anonymous.
4. Advertising
The free version of the mobile app shows ads. Accounts with Premium are not shown ads.
Ads are delivered through Unity LevelPlay (Unity / ironSource), which passes ad requests to advertising networks
To deliver and measure ads, Unity and those networks collect information from your device, including its advertising ID, IP address, device model, operating system, language, and which ads you saw or tapped
Depending on your device settings and where you live, this information may be used to show you ads based on your interests
We do not give advertising partners your name, email address, display name or gameplay
Your choices: you can reset or delete your advertising ID and turn off ad personalisation in your device settings (Android: Settings → Google → Ads; iOS: Settings → Privacy & Security → Tracking). See Unity's Privacy Policy.
5. Service Providers and Other Disclosures
We share information with the companies that operate parts of the App for us:
We may also disclose information if the law requires it, in response to a valid legal request, or to protect the rights and safety of our players and the Service. If Lexinum is transferred to another owner, your information may be transferred with it under this policy.
6. Purchases and Subscriptions
This section applies if you buy Lexinum Premium (a weekly, monthly or yearly subscription, or the one-time lifetime purchase). The purchase terms themselves are in section 7 of our Terms of Service.
6.1 Payment
Payment is taken by the app store on your device: Google Play, or the Apple App Store where Premium is offered there. The store handles your payment method under its own privacy policy. We never receive or store your card details.
6.2 Adapty, Our Subscription Provider
We use Adapty (Adapty Tech Inc.) to check purchases with the store and to keep track of whether a subscription is active. On devices where Premium is offered, the Adapty software in the app starts when you open the app, so the account ID and device information below are sent even if you never buy anything. Adapty receives:
Your Lexinum account ID: a random identifier. We do not send Adapty your name, email address, profile picture or anything about the games you play
Purchase information from the store: the plan bought, the store's purchase and transaction identifiers, price and currency, purchase, renewal and expiry dates, and whether the purchase was cancelled or refunded
Device and app information: device model, operating system and app version, language and region, time zone, IP address and, on Android, the device's advertising ID
Adapty processes this information on our behalf and stores it on servers that may be outside your country, including in the United States. See Adapty's Privacy Policy.
6.3 What We Store
When the store confirms a purchase, renewal, expiry or refund, Adapty notifies our server, and we save on your account:
Whether Premium is active
The plan and the store it was bought from
The expiry date, whether it will renew, and whether it is a lifetime purchase
Whether it was refunded or is in a billing grace period
The identifier Adapty uses for your account
The details are visible only to you. The fact that an account has Premium (yes or no) is part of the profile that the apps of other signed-in players can read.
6.4 Purchase Analytics
We record in our analytics when the Premium screen is opened, when a purchase is completed or is pending, when purchases are restored, and whether an account is free or Premium. We use this to understand how Premium is used. It does not include payment details.
6.5 Why We Process This, and for How Long
Purpose: to give you what you paid for, on every device where you sign in, and to remove it when a subscription ends or is refunded
Legal basis: performance of our contract with you; legal obligations for transaction records; legitimate interest for purchase analytics
Retention: we keep the purchase information on your account for as long as the account exists, and delete it with the rest of your account data (section 8). The store and Adapty keep transaction records for as long as their own policies and the law require
Deleting your Lexinum account does not cancel a subscription. Cancel it in the store first. To ask for the data Adapty holds about you to be deleted, contact us at [email protected].
7. Storage, Security and International Transfers
Account and game data are stored with Google Firebase on servers in the United States
Data is encrypted in transit and at rest by our providers
Database rules restrict what each signed-in player's app can read and write. Results that matter for fairness, such as Daily Challenge guesses, rankings and Premium status, are written only by our servers
Lexinum is operated from Turkey. Your information is transferred to, stored and processed in the United States and in other countries where our service providers operate. Where the law requires it, these transfers rely on appropriate safeguards such as the European Commission's Standard Contractual Clauses.
Note: No method of transmission over the Internet or electronic storage is 100% secure. We work to protect your information but cannot guarantee absolute security.
8. Data Retention
Account, profile, friends, rankings, game recordings and themes: kept for as long as your account exists
Online matches: a challenge nobody joins is deleted after about 24 hours, and a finished match after about 48 hours. Your ranking and the game recording remain
Notification tokens: removed when they stop working
Analytics, crash and advertising data: kept by the provider for the periods set out in its own policy
After a deletion request: we delete your account and the personal information linked to it within 30 days. Copies may remain in backups for up to 90 days, and we keep what the law requires us to keep. Results already shown to other players may remain without your name
Inactive accounts: an account that has not been used for more than 3 years may be deleted
9. Your Rights and Choices
Depending on where you live, you may have the right to access, correct, delete, restrict or object to the processing of your personal information, to receive a copy of it, and to withdraw consent.
9.1 In the App
Change your display name and avatar in your profile
Turn notifications off in the app's settings or in your device settings
Remove friends and block players
Refuse or withdraw the camera, local network and notification permissions in your device settings
9.2 Deleting Your Account
To have your account and its data deleted, use the Data Deletion Request page or write to [email protected] from the email address of the account. For a guest account, include your friend code so we can find it. Deleting an account does not cancel a subscription; cancel it in the store first.
9.3 Other Requests
Send any other request to [email protected]. We will respond within 30 days, and may ask you to confirm that the account is yours.
10. Children's Privacy
Lexinum is not intended for children under the age of 13 (or 16 in the European Economic Area). We do not knowingly collect personal information from them. If you are a parent or guardian and believe your child has given us personal information, contact us at [email protected] and we will delete it.
11. European Privacy Rights (GDPR)
If you are in the European Economic Area, the United Kingdom or Switzerland:
11.1 Legal Basis for Processing
Contract: running your account, the games, online play, rankings and Premium
Legitimate interests: keeping play fair and the service secure, diagnosing crashes, understanding how the App is used, and showing ads in the free version
Consent: notifications, the camera and local network permissions, and, where the law requires it, personalised advertising
Legal obligation: keeping records the law requires
11.2 Your Rights
Right to access, rectify, erase, or restrict processing
Right to data portability
Right to object to processing based on legitimate interests
Right to withdraw consent at any time
Right to lodge a complaint with your data protection authority
If you are a California resident, you have the right to know what personal information we collect and why, to have it deleted, and not to be discriminated against for exercising these rights. We do not sell your personal information for money. The use of advertising identifiers by our advertising partners (section 4) may count as "sharing" under California law; you can limit it through the device settings described in section 4. To exercise your rights, contact [email protected].
13. The lexinum.org Website
The website shows information about the app, these legal pages and the pages that open when you follow an invite link. It has no accounts and no analytics or advertising trackers of its own. It is delivered through Cloudflare, which processes your IP address and may set cookies that are strictly necessary for security.
14. Changes to This Privacy Policy
We may update this Privacy Policy to reflect changes in the App or in the law. When we make a significant change we will update the "Last Updated" date above and, where appropriate, tell you in the App.
15. Contact Us
If you have questions, concerns, or requests regarding this Privacy Policy, please contact us: