1 Introduction
Welcome to Englo, an English learning application developed and maintained by Radixivity ("we," "our," or "us"). This Privacy Policy explains how we collect, use, store, and protect information when you use the Englo mobile application (the "App") on Android devices.
By downloading or using the App, you agree to the practices described in this Policy. If you do not agree, please do not use the App. We are committed to protecting your privacy and complying with all applicable data protection laws.
2 Information We Collect
We collect only the minimum information needed to provide the App's functionality.
| Data Type | What It Is | How Collected | Where Stored | Sent to Server? |
|---|---|---|---|---|
| Display Name | A nickname you enter at first launch (e.g., "Ali" or "Learner") | User-provided | On-device (SQLite) | No |
| Device ID | A randomly generated UUID created locally the first time you open the App | Auto-generated | On-device (SharedPreferences) | No |
| Learning Progress | XP earned, level, streak, quiz scores, completed chapters | App usage | On-device (SQLite) | No |
| App Preferences | Dark/Light mode setting | User action | On-device (SharedPreferences) | No |
| Cached Content | Educational content (vocabulary, grammar, quizzes) downloaded from our server for offline use | Network fetch | On-device (SQLite) | N/A — received, not sent |
| FCM Token | A push notification token generated by Firebase to deliver daily reminders | Auto-generated by Firebase | Firebase servers (Google) | Yes — Firebase only |
| Advertising ID | Google's resettable advertising identifier (GAID), used by AdMob to serve relevant ads | AdMob SDK | Google's servers | Yes — Google AdMob |
| App Usage Analytics | Screens visited, button taps, app session information | Firebase Analytics SDK | Google's servers | Yes — Firebase Analytics |
| Crash Reports | Technical error logs if the App crashes | Firebase SDK | Google's servers | Yes — Firebase |
3 How We Use Your Information
We use the collected data for the following purposes:
| Purpose | Data Used |
|---|---|
| Provide core learning functionality (modules, quizzes, progress) | Display Name, Device ID, Learning Progress |
| Remember your theme preference between sessions | App Preferences |
| Serve educational content offline | Cached Content |
| Send daily practice reminders (if you allow notifications) | FCM Token |
| Display advertisements to support free access to the App | Advertising ID (via AdMob) |
| Understand how users interact with the App to improve it | App Usage Analytics (via Firebase) |
| Identify and fix technical issues | Crash Reports (via Firebase) |
4 Third-Party Services
The App integrates third-party SDKs provided by Google LLC. These services operate under Google's own privacy policies and may collect data independently.
🔔 Firebase Cloud Messaging (FCM)
Delivers push notifications (daily reminders). Collects a device registration token.
Firebase Privacy Policy →📊 Firebase Analytics
Collects anonymized app usage events to help us improve the learning experience.
Firebase Privacy Policy →⚙️ Firebase Remote Config
Allows us to update app settings (such as enabling or disabling ads) without releasing a new app version.
Firebase Privacy Policy →🛡️ Firebase Crashlytics
Automatically collects crash reports and diagnostic data (device model, OS version, app version, stack trace) when the App encounters an error. This helps us identify and fix technical issues quickly.
Firebase Privacy Policy →📢 Google AdMob
Serves banner, interstitial, native, and rewarded ads. May collect Advertising ID and approximate location for ad targeting.
Google Privacy Policy →5 Data Sharing and Disclosure
We do not sell, rent, or trade your personal information. We share data only in the following limited circumstances:
| Recipient | Data Shared | Reason |
|---|---|---|
| Google LLC (Firebase) | FCM Token, Analytics Events, Crash Logs | Push notifications, app improvement, crash diagnosis |
| Google LLC (AdMob) | Advertising ID, App Interactions | Ad delivery and monetization to keep the App free |
| Law Enforcement / Courts | Minimum required data | Only if legally compelled by a valid court order or applicable law |
6 App Permissions
| Permission | Why We Need It |
|---|---|
INTERNET |
Download educational content from our server, load ads, and connect to Firebase services |
ACCESS_NETWORK_STATE |
Check whether the device is online before making network requests (enables offline mode) |
ACCESS_WIFI_STATE |
Check Wi-Fi connectivity status for optimized content loading |
POST_NOTIFICATIONS |
Display daily practice reminder notifications (Android 13+). You can revoke this at any time in device Settings. |
7 Data Storage and Security
All personal data stored by the App (your name, progress, preferences) resides entirely on your device in a local SQLite database and Android SharedPreferences. This data is protected by Android's app sandboxing and is not accessible to other apps on your device.
All data transmitted between the App and our servers or third-party services (Firebase, AdMob) is encrypted in transit using TLS (HTTPS).
We retain data for as long as necessary to provide the service. When you uninstall the App, all locally stored data is permanently deleted from your device.
8 Children's Privacy
Englo is a general-audience education app suitable for all ages. It does not knowingly collect any personal information from children under the age of 13, and it does not include features designed to attract children under 13 as its primary audience.
The App does not require account creation, email addresses, or any identifiable personal information from any user, including minors. Advertisements served via AdMob are configured to comply with Google's Families Policy requirements.
If you believe a child has inadvertently provided personal information through the App, please contact us immediately at radixivity.official@gmail.com and we will take prompt action.
9 Your Rights and Choices
| Your Right | How to Exercise It |
|---|---|
| Delete all local data | Go to Android Settings → Apps → Englo → Storage → Clear Data. This permanently removes your profile, progress, and preferences. |
| Opt out of personalized ads | Go to Android Settings → Google → Ads → Opt out of Ads Personalization. You will still see ads, but they will not be personalized. |
| Reset Advertising ID | Android Settings → Google → Ads → Reset advertising ID. |
| Disable notifications | Android Settings → Apps → Englo → Notifications → Toggle off. |
| Request data deletion by email | Email us at radixivity.official@gmail.com. Since we hold no server-side personal data for you, we will confirm in writing. |
10 Data Retention
On-device data (profile, progress, preferences): Retained until you clear the App's data or uninstall the App.
Firebase / Google data (analytics events, crash logs): Retained according to Google's own retention policies, typically up to 14 months for Firebase Analytics. See Firebase Privacy for details.
Server-side content data (vocabulary, grammar lessons, quiz questions): These are educational resources we serve — they are not personal data and are retained indefinitely as part of the App's content library.
11 Changes to This Privacy Policy
We may update this Privacy Policy from time to time to reflect changes in our practices or applicable law. When we make material changes, we will update the "Last Updated" date at the top of this page. Continued use of the App after such changes constitutes your acceptance of the revised Policy.
We encourage you to review this Policy periodically. For major changes, we may also notify you via an in-app notification.
12 Contact Us
Questions about your privacy?
We're happy to help. Reach out to us through any of the channels below.
📧 Email: radixivity.official@gmail.com
🌐 Website: radixivity.com
📘 Facebook: facebook.com/radixivity
💬 WhatsApp: +880 1540-736159
Developer: Radixivity · Bangladesh
App Package: com.radixivity.englo