Learning on your device
No app account is required. Lessons, study lists, progress, settings, and ordinary study statistics are stored locally. We do not use advertising SDKs, cross-app tracking, or an analytics SDK. Device backups may include local app data according to your Apple settings. Removing the app removes its local data; we do not provide an account-based progress recovery service.
Speech and TJ conversations
Microphone access is used for speaking practice and voice conversations. Apple online speech recognition is allowed by default when available and permitted; speech may be sent to Apple for recognition under Apple's terms and privacy practices. You can turn off Apple online speech in the app's preferences. On-device recognition depends on the available local engine and models.
TJ's conversation generation uses Apple Foundation Models on supported devices. Jintus Labs does not upload ordinary TJ conversations to a cloud language-model provider. Conversation audio playback is generated locally or uses bundled recordings. Optional feedback is described below.
Reports you choose to send
When you contact support, we receive your message, reply email, selected screenshots or attachments, app/build version, device description, and operating-system version. Content reports may include the relevant lesson, question, and answer. Speaking diagnostics can include recognized text, the expected phrase, and diagnostic details; they do not attach raw microphone recordings.
The optional TJ transcript feedback action sends a conversation transcript and diagnostics after attempting to remove identifying information. Automated removal is imperfect: avoid including sensitive information. Reports that cannot be made safe enough are blocked. Reports you have chosen to send may be queued locally and retried when delivery becomes available. Exporting a transcript uses the sharing destination you select.
Secure support delivery
Our Cloudflare-hosted support service uses Apple App Attest to verify the app. It stores an app-installation verification key, its public key and verification counters, and short-lived challenges. These are used to prevent abuse, not for advertising or cross-app tracking. Network providers process connection information, including IP addresses, to deliver and secure requests. Support delivery uses our mail service and support mailbox.
We use submitted information to respond, investigate bugs and teaching issues, and improve the app. We do not sell it or share it for advertising. We retain support information only as reasonably needed for those purposes, basic records, and legal requirements. Contact us to request deletion of submitted support information; provide enough detail to locate it.
TestFlight
Apple operates TestFlight and makes beta-testing information such as sessions, crashes, and feedback available to developers under its TestFlight privacy terms. This is separate from in-app support. The beta includes invited adults and teenagers ages 13 and older who meet Apple’s local TestFlight minimum age. Testers under 18 should review the TestFlight terms, app terms, and this policy with a parent or guardian. This beta is not offered to children under 13. Please avoid sending sensitive personal information in conversations or feedback.
Questions and updates
Contact Jintus Labs support for privacy questions or deletion requests. We will update this page when relevant practices change. The general Jintus Labs policy also describes our website and support practices; this app-specific page explains the speech and beta features.