Shiftalk ("the App") is a Japanese language learning application for foreign workers
in Japan. We are committed to protecting your privacy. This policy explains what
information the App handles and how.
Effective date: April 1, 2026
2. Information We Do NOT Collect
Shiftalk does not collect, transmit, or store any personal information on external servers. We do not collect:
Name, email address, or phone number
Device identifiers or advertising IDs
Location data
Usage analytics or crash reports sent to our servers
Any data that identifies you personally
3. Data Stored Locally on Your Device
The App stores the following data only on your device using AsyncStorage. This data never leaves your device:
Learning progress – which phrases you have marked as mastered
Study streak – consecutive study days count
UI language preference – Vietnamese / Indonesian / English
Selected industry – Factory / Restaurant / Care
Notification setting – on/off toggle (UI only; no push notifications are sent)
Custom phrases – phrases you add in My Phrases
Onboarding status – whether you have completed the intro screens
4. Third-Party Services
The App uses the following device-native features. These operate on your device and are governed by your operating system's privacy policy:
Text-to-Speech (expo-speech) – uses your device's built-in TTS engine to read Japanese phrases aloud. No audio data is sent to our servers.
We do not integrate any advertising networks, analytics SDKs (e.g., Firebase, Amplitude), or social login services.
5. Children's Privacy
Shiftalk is designed for adult foreign workers. We do not knowingly collect any information from children under 13.
6. Data Deletion
All app data is stored locally on your device. You can delete all data at any time by uninstalling the App.
7. Changes to This Policy
If we update this policy, the new version will be posted at this URL with an updated effective date.
8. Contact
Questions? Contact us at: katanaapps.dev@gmail.com