Privacy at a glance
Learn Bulgarian: Speak & Read for Android is an offline learning app by Andrii Matiushev, trading as Zydeno. There is no account, advertising, analytics or tracking. Your learning progress remains on your device.
Who we are#
The app is published by Andrii Matiushev, trading as Zydeno. Package: com.zydeno.learnbulgarian. Contact: [email protected]. This policy covers the Android app, its Home Screen widget, support correspondence and these legal pages. The iOS edition has its own privacy policy.
Information on your device#
The app stores lesson completion, scores, spaced-repetition schedules, mistakes and typed exercise answers, favourite and hidden words, independent-practice drafts and checklists, study activity, achievements and display preferences in its private storage. We cannot access or recover these records. The app does not request Internet access and contains no advertising, analytics, crash-reporting, account or tracking SDK.
Reset progress in Settings to remove your learning records. Uninstalling removes the app's private data. Exported files that you have saved elsewhere remain at the destination you chose. Automatic Android app backup is disabled; use the explicit progress export if you want to keep a copy.
Microphone and speaking practice#
Microphone permission is requested only when you choose recording or on-device speech feedback. Ordinary speaking practice records up to 10 seconds; independent practice allows up to 30 seconds. Recordings are kept temporarily in the app's cache for your own playback. A new take replaces the previous one, and the app removes the take when you leave the exercise or the app goes into the background. Unexpected termination may leave a cache file until the app or Android clears it.
Recordings are not included in progress backups and are never uploaded by the app. Optional speech feedback uses only Android's on-device speech recognizer on supported devices. There is no online recognition fallback. If local Bulgarian recognition is unavailable, you can listen to your take and assess it yourself. Recognition feedback can be inaccurate and is not a professional pronunciation assessment. We do not create voiceprints or use recordings to identify you.
Model audio and system voices#
Most model audio is included with the app: contributed recordings and previously generated speech. For text without a bundled recording the app uses an installed Bulgarian system voice only when it is marked as available offline. It does not use a network voice. Installing system voice data outside the app is handled by your device's voice provider under that provider's terms.
Progress backups and completion images#
You can export a JSON progress file through Android's document picker. It contains learning records, saved exercise answers, independent drafts, favourite and hidden words, and preferences. It contains no voice recordings. The exported JSON is not encrypted by the app; anyone with access to the file can read it. Import validates the file and merges learning records locally.
Completion images are generated on your device with the optional display name you enter, course level, lesson count and completion date. The name is not saved in a profile or sent to us. Saving an image or progress file to a cloud document provider, or sharing it with another app, gives that provider or recipient access to the file you selected. We do not receive a copy. These user-directed destinations have their own privacy practices.
Local reminders and widgets#
Notification permission is optional. Reminders are scheduled locally by Android, and can be disabled in the app or system settings. There are no remote push notifications. The Home Screen widget displays your daily goal, a Bulgarian word and review count from local app data. Information visible in a widget may be seen by anyone who can view your Home Screen.
Support correspondence#
We receive information only when you choose to contact support. Your e-mail address, message and any files you attach are used to answer your request and resolve the issue. Do not include recordings, backups or sensitive personal information unless you intend to share them. You may request deletion of your support correspondence at [email protected], subject to any applicable record-retention obligation.
Google Play and external websites#
Google Play, Android, your device manufacturer, keyboard, e-mail application, document providers and websites you open are separate services. They operate under their own privacy policies. Google Play may collect installation, device or diagnostic information under its platform policies; the app does not integrate a developer-operated collection service. These legal pages are hosted on zydeno.com, whose web hosting and delivery providers may process ordinary request information such as IP address, browser and request time to deliver and protect the website.
Your choices and rights#
You can decline microphone and notification access while using the rest of the course. You can revoke permissions in Android Settings, reset local progress, delete exported files at their saved destinations and uninstall the app. Because local learning data is not sent to us, we cannot fulfil access or deletion requests for that device data on your behalf. Contact us about any support correspondence or privacy question. Where applicable, you may also contact your local data-protection authority.
Children#
The app is intended for general language study, especially adult learners. We do not knowingly collect children's personal information or provide child accounts. If you believe a child has sent us personal information in a support message, contact us so we can address it.
Changes to this policy#
Changes will be published on this page with an updated effective date. If the app's data handling changes materially, we will update the app's disclosures before introducing that behaviour.