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Nona Privacy Policy

Effective: August 25, 2026  ·  Last updated: August 27, 2026

1. Who We Are

SENDA LLC ("we", "us", "our", "Senda") is a limited liability company organized under the laws of the Commonwealth of Puerto Rico, with a mailing address at:

410 Avenida Montesol, Ste 14 #2078 Fajardo, Puerto Rico 00738

Senda LLC is responsible for the Nona mobile application (the "App"), the daily sudoku. This Privacy Policy explains what information we collect when you use the App, how we use it, who we share it with, and what rights you have over it.

If you have questions about this Policy, write to us at support@sendapr.com.

2. The Short Version

So that this policy does not require a lawyer to understand, here are the points that matter most:

• You can play without an account. "Play without an account" takes you straight to the daily sudoku and to free play, without giving us any personal data. An account is needed only for the social features — profile, friends and leaderboard — and it is created with Google or Apple; we neither create nor store passwords.
• Nona works entirely offline. Each day's sudoku travels inside the App; it is not downloaded. You can play on a plane, and your progress lives on your phone.
• Your account belongs to Juegos Senda, not just to Nona. Nona is part of a family of games by Senda LLC. Your @username, display name, avatar, country and friends list are the same across all of them. Your Nona progress, by contrast, belongs to Nona alone (see 3.1 and 3.3).
• Who can see that you play Nona: only your friends. The App shows your friends that you already have Nona, and shows you which of your friends do not have it yet, so that you can invite them. That fact — which games in the family you have — can only be looked up by your friends, not by anyone with an account (see 3.4).
• We do not sell your personal information to advertisers or to data brokers, and we never will.
• Your games are private. The detail of each sudoku — what you put in each cell, how many mistakes, how long you took — can be read only by your own account.
• We do not store your Google or Apple profile photo. Your visible identity in Nona is the avatar you choose inside the App.
• With Apple you can hide your email. If you use "Hide My Email", Apple gives us a relay address and we never see your real one.
• In Apple's settings, Nona appears as "CINCO". This is not a mistake: the games in the family share a single Apple sign-in, and the system lists it under the name of the first one (see 3.2).
• The App is free and shows ads (Google AdMob), which use your device's advertising identifiers. On iOS we ask you first through the system prompt; in the European Union and the United Kingdom, Google's consent form is shown as well.
• The "Remove ads" purchase is processed by the store. The one-time payment that removes advertising is handled entirely by the App Store or Google Play: we never see your card number or your payment details.
• We collect usage and crash data to understand how the App is used and to fix what breaks. It is tied to an installation identifier that is never cross-referenced with your account (see 3.8 and 3.9).
• Your data lives on Google servers (Firebase) in the United States region. If you write to us from the European Union, the EEA, Switzerland or the United Kingdom, that transfer relies on the EU–U.S. Data Privacy Framework and on Standard Contractual Clauses (see 5.1).
• We verify that the App is genuine. At launch, Google or Apple certify that Nona is running on a real, unmodified device. We only receive a yes/no, never the device signals themselves (see 3.11).
• You can leave Nona only, or delete your whole account. These are two different things and both are in the App. The details are in How to delete your account.

3. Information We Collect

3.1 Your account information (only if you create one)

If you play without an account, none of this section applies: there is no profile, no email, no user identifier, and your progress lives only on the phone (see 3.10). Advertising (3.6), usage data (3.8), crash reports (3.9) and the integrity check (3.11) do still apply, because they do not depend on your having an account.

An account is optional and exists for the social features. Nona has no password-based registration: you sign in with Google or Apple, and the provider you choose passes us a user identifier and your email address. That email is administered by Firebase Authentication (Google) as part of the account system; we do not copy it into our profile database and we do not show it to other players.

If you sign in with Apple and choose "Hide My Email", Apple generates a private relay address. In that case we never learn your real email.

Your account belongs to Juegos Senda, not just to Nona. If you install another game in the family and sign in with the same Google or Apple credentials, it is the same account and the same profile: your @username, display name, avatar, country and friends list are the same across all of them, and changing them in one game changes them in the others. Each game's progress is separate: your Nona games, streak and points do not appear in any other game, nor do another game's appear here.

When the account is created we take the name the provider gives us, once, to seed your display name. From then on that name is yours: you can change it, and no later sign-in overwrites it. The provider's profile photo is never stored at any point.

3.2 "Sign in with Apple" appears as CINCO

If you sign in with Apple, this is worth knowing because it is otherwise disconcerting: under Settings → your name → Sign in with Apple, Nona does not appear under its own name, but as "CINCO".

The reason is technical and changes nothing about what we do with your data: the Juegos Senda games share a single application identifier with Apple, grouped under that of the first game in the family. Apple lists that grouping under the name of the primary one. It is the same authorization for every game in the family, which is precisely what makes your account the same across all of them.

This matters most when deleting your account: if you withdraw the permission from Apple's Settings, you withdraw it for the whole family, not only for Nona.

3.3 Your profile and your Nona progress

We store two different things in Firestore, and the difference matters:

Your Juegos Senda profile, shared across every game:

• @username: the unique identifier you choose the first time you sign in. It is permanent: once set it cannot be changed, because other players find you by it.
• Display name, avatar (one of those the App offers) and country, if you choose to give it.
• The date your account was created.

Your Nona progress, stored separately and for this game only:

• Scores: current streak, best streak, total points and the weekly and monthly aggregates that feed the leaderboard, plus the last day you played.
• Your daily games: the result of each day. They are private: our security rules allow only the account that created them to read them.

We also store, in a private area only you can read, your last activity and your notification token (see 3.5).

3.4 Friendships, cross-game invitations and blocks

If you use the social features we store:

• Requests and friendships: one record per pair of players, with who requested it and its status (pending or active).
• Nudges: the prompt you send a friend to get them to play.
• Blocks: your list of blocked accounts, which is private and readable only by you. A block prevents that person from sending you requests.
• Reports: if you report a player, we receive the alert along with the identifier of the reported account so that we can review it.

Which games in the family you have, and who can see it

Nona includes a cross-invitation feature: in your friends list you can see which of your friends do not have Nona yet, so that you can invite them, and they can see you the same way from the other games in the family.

To make that work we store, for each game in the family, whether you have signed into it with your account.

Only your friends can look this up. Someone who is not your friend cannot find out which Juegos Senda games you play, even if they find you by your @username. The same applies to your Nona scores — streak and points: your friends read them, for the friends leaderboard, and nobody else does.

Which games you have LEFT is yours alone. If you leave a game from its account screen, we store that decision so as not to mark you as one of its players again, and that record cannot be read by anyone but you.

What anyone with an account can see

So that people can find you by your @username and send you a request, your Juegos Senda profile — @username, display name, avatar and country — is readable by anyone with an account in the family. That is what makes it possible for a friend to look you up before they are one.

One consequence is worth stating plainly: if you also play CINCO, because of how its data was stored from the first day, its score and streak live in that same shared profile. From there it can be inferred that you have CINCO, and its points seen, without being your friend. Nona does not work this way: its progress lives separately and is closed to your friends. We are working on correcting that difference in CINCO.

3.5 Notifications

If you agree to receive notifications, we store the messaging token that Firebase assigns to your installation of the App. That token identifies the device so that alerts can be delivered to it (friend requests, acceptances and nudges) and it renews itself. It is stored in the private area of your profile, which only you can read.

We do not ask you for the permission when you open the App. We ask when it is needed and makes sense — for example, when you accept a friendship — so that you know what it is for before deciding. If you decline, no token is stored.

The token is per account and per game: if you switch accounts on the same phone, the previous one is discarded.

3.6 Advertising

Nona is free and shows Google AdMob ads, as a banner and as a full-screen ad between games. To serve them, AdMob receives your device's advertising identifier (IDFA on iOS, AAID on Android), your IP address and ad events (whether it was shown, whether you tapped it).

Before requesting the first ad we run two consent checks, in this order:

1. Google UMP, the GDPR consent form. In the European Union and the United Kingdom the form is shown; in Puerto Rico and the rest of the United States it resolves automatically as not required.
2. App Tracking Transparency on iOS: the system prompt asking whether you allow tracking. If you decline, ads keep working but are not personalized with your identifier.

Personalization is applied by Google's own SDK on the basis of that consent; we do not build advertising profiles ourselves.

If you buy Remove ads, the App stops requesting ads: from that moment AdMob receives nothing from your device on Nona's behalf.

3.7 Your purchase ("Remove ads")

Nona offers a single optional purchase: a one-time payment that removes advertising.

We neither receive nor store your payment details. The transaction happens entirely inside Apple's App Store or Google Play: they charge you, they hold your payment method and they issue the receipt. We never see your card or your billing address.

The only thing the App stores is a yes/no marker on your own device indicating that the purchase is active. That marker does not travel to our servers and is not associated with your profile: your Nona account does not know whether you have bought it.

As a result, the purchase lives in the store account you paid with, not in your Nona account. If you reinstall the App or get a new phone, use "Restore purchases" on the More screen so that the store confirms it again.

3.8 Usage data

We use Google Analytics for Firebase to understand how the App is used and to decide what to improve.

On the one hand, usage data is recorded automatically: when the App is first opened, when a session starts and ends, which screens are visited, whether the App is updated, and technical device data (model, system version, language and approximate country by IP).

On the other, we record a limited set of specific actions, which are these and no others:

• Finishing the daily sudoku, recording that day's difficulty and how many mistakes were counted against you (from 0 to 5). We record neither the time nor the score.
• Finishing a free play puzzle, recording only its difficulty.
• Choosing "Play without an account".
• Signing in, recording only whether it was with Google or with Apple.
• Buying or restoring "Remove ads".
• Sharing a result.
• Sending or accepting a friend request, sending a nudge, and sending an invitation to another game in the family.
• On account deletion, whether the revocation of the "Sign in with Apple" permission succeeded or failed. We record it because a failure there is not visible anywhere else and we need to be able to detect it.

We also store, as a preference for segmenting the analysis, the colour theme and the language you choose. Never anything that identifies you.

What we do NOT record: the content of your games, your email, your name, your @username, or any data that identifies you as a person.

This data travels attached to an installation identifier generated by Firebase. That identifier is not cross-referenced with your account: the App never tells the analytics who you are — we do not set a user identifier — so there is no way to join that data to your profile, your @username or your games. When you delete your account, that identifier remains unlinked to anything of yours, because it never was linked.

So that we can analyse it, this data is exported to BigQuery (Google Cloud's data warehouse, inside our own project), where it is stored event by event and kept for a maximum of 400 days. We use it to produce aggregate figures — how many people play, how often — never to follow a particular person or to build a profile of them.

3.9 Crash diagnostics

So that we can fix what breaks we use Firebase Crashlytics and Sentry. When the App fails we receive a technical report: device model, operating system version, App version and the error trace. These reports exist to diagnose defects, not to profile users, and they contain neither your profile nor the content of your games.

3.10 Data that stays on your phone

Nona is designed to work offline, so your phone is the primary source of your progress: the streak, the points, the state of the game in progress, your language and colour preferences, and the purchase marker described above are stored on the device itself.

That data does not leave your phone except when it syncs with your account — if you have one — and it disappears if you uninstall the App.

3.11 Integrity check (App Check)

So that our servers cannot be used from a modified copy of the App or from an automated script, Nona uses Firebase App Check, which relies on Play Integrity (Android) and App Attest (iOS).

At launch, the App asks Google or Apple — depending on your system — for a certificate that it is running on a real device and in a legitimate installation, and attaches that certificate to its requests to Firebase. To issue it, Google or Apple evaluate signals from the device and from the installation itself in accordance with their own privacy policies.

We do not receive those signals: only the verdict reaches us (valid or not valid), which does not identify you, is not stored in your profile and is not cross-referenced with any other data of yours. This check runs whether you play with an account or without one.

3.12 When you share your result

At the end of a game you can share your result. The App publishes nothing on its own: it prepares a text — the day's difficulty, your points, a row of squares summarising how many mistakes you made and, if you have one, your streak — and hands it to your operating system's share menu. You choose who to send it to and through which app.

That text never passes through our servers, and it does not reveal the sudoku: it includes neither the board nor what you put in each cell, so as not to spoil it for whoever receives it. It does not include your time either, because the clock does not affect scoring.

4. How We Use Your Information

We use the information described above solely to:

• Run the game: deliver the daily sudoku, keep count of your mistakes, calculate your streak and your points, and preserve them if you change phones.
• Support the social features: let your friends find you by your @username, show the friends leaderboard, deliver nudges, and show you which friends you can invite to Nona.
• Send you notifications related to those features, if you accepted them.
• Show ads, which are what pays for the App's development — and stop showing them if you buy "Remove ads".
• Keep the App standing: diagnose failures and prevent abuse.
• Comply with the law when we are required to.

We do not use your information to make automated decisions producing legal effects concerning you.

4.1 On what legal basis (European Union, EEA and United Kingdom)

If you are in the European Union, the EEA or the United Kingdom, the GDPR requires us to tell you which legal basis each processing operation rests on. These are:

Where the basis is consent, you can withdraw it at any time without affecting what was processed beforehand. Where the basis is legitimate interests, you can object by writing to us at support@sendapr.com and we will consider your case.

5. Who We Share Your Information With

We do not sell your personal information. We share it only with the providers that make the App work:

About the last two rows it is worth being explicit: Apple and Google act as the sellers of the "Remove ads" purchase. They receive your payment details directly and handle them under their own privacy policies; all we receive from them is confirmation that the purchase exists.

We may also disclose information if the law requires it, to respond to a valid request from a competent authority, or to protect the rights and safety of our users.

5.1 Where data is stored, and international transfers

Your data is stored on Google servers in the United States region, and the providers in the table above process it there.

If you are in the European Union, the European Economic Area, Switzerland or the United Kingdom, sending your data to the United States is an international transfer. It relies on two safeguards, cumulatively:

• The EU–U.S. Data Privacy Framework and its United Kingdom and Switzerland extensions, to which the providers receiving your data adhere.
• The Standard Contractual Clauses approved by the European Commission, which form part of the data processing agreements we have signed with those providers.

If you would like a copy of the safeguards applicable to your case, ask us at support@sendapr.com.

6. What Other Players Can See

If you play without an account you appear nowhere: you have no profile for others to see. What follows applies only if you created an account, and it is worth stating explicitly because it is the part that most often surprises people:

• Visible to anyone with a Juegos Senda account: your @username, your display name, your avatar and your country if you gave it. This is what allows a friend to find you before they are one. (If you also play CINCO, its points and streak as well — see 3.4.)
• Visible only to your friends: that you have Nona, and your Nona scores (current streak, best streak, total points and the weekly and monthly ones) for the friends leaderboard.
• Visible only to you: the detail of each game, your block list, your email address, your last activity, your notification token, and which games in the family you have left.
• Visible to the other person: that you sent them a friend request, a nudge or an invitation to Nona.

If you would rather not appear under your real name, use a different display name: it is editable at any time from your profile.

7. Your Rights

At any time, you can:

• Access the information we hold about you.
• Correct your display name, avatar and country from within the App. Remember that those three are shared across every game in the family.
• Leave Nona only, keeping your account, your @username and your friends.
• Delete your Juegos Senda account and all associated data, across every game in the family. Both options are in the App and are explained in How to delete your account.
• Request a copy of your data in machine-readable format.
• Withdraw consent for personalized advertising, from your operating system's privacy settings.
• Turn off notifications, from the system settings.

To exercise any of these rights, write to us at support@sendapr.com. We respond within 30 days, and usually much sooner.

7.1 Additional rights in the European Union, the EEA and the United Kingdom

If you are in those territories, the GDPR also grants you the rights of access, rectification, erasure, restriction of processing, portability and objection, and the right to withdraw your consent at any time without affecting the lawfulness of processing carried out beforehand. We do not charge for handling them.

And you have the right to lodge a complaint with your country's supervisory authority if you believe we are handling your data improperly. For example, the Information Commissioner's Office (ico.org.uk) if you are in the United Kingdom, the Agencia Española de Protección de Datos (aepd.es) if you are in Spain, and the corresponding authority in other countries. We would appreciate it if you wrote to us first so we could try to resolve it, but that is neither a requirement nor a precondition.

8. Security

Access to the data is governed by security rules on the server itself: each account can write only its own profile and its own progress, your games and your block list are unreadable to third parties, which games in the family you have can be read only by your active friends, and a friendship can only be accepted by the person who received it. Communications between the App and our servers travel encrypted over TLS.

No system is invulnerable. Should a breach affecting your personal information occur, we will notify you through the contact means available and in accordance with applicable law.

9. Data Retention

We keep your information while your account is active. If you delete the account, we delete your profile, your games, your friendships and your notification token.

In more detail, by type of data:

If you leave Nona only, without deleting the account, your Nona progress is deleted and you stop appearing in its leaderboard; your profile, your @username and your friends remain intact.

Deleting your account neither cancels nor refunds the "Remove ads" purchase, because that purchase does not live in your account but in your Apple or Google account. It will remain available through "Restore purchases" even if you start a new account.

We may keep for longer those records the law obliges us to retain, typically for accounting or tax reasons.

10. Children

Nona is not directed at children under 13 and we do not knowingly collect information from children of that age. If we discover that we have received information from a child under 13, we will delete it immediately. If you are a parent or guardian and believe your child has given us information, write to us at support@sendapr.com.

11. Changes to this Policy

We may update this Policy when the App's features or the applicable law change. When we do, we will update the "Last updated" date at the top of this document. If the change is significant, we will tell you inside the App before it takes effect.

12. How to Contact Us

SENDA LLC 410 Avenida Montesol, Ste 14 #2078 Fajardo, Puerto Rico 00738

Email: support@sendapr.com

Use of the App is also governed by our Terms of Service.