Voice CBT diary with on-device speech recognition: Flutter and on-device Whisper

▤ Summary

This article explains how to build a voice-based CBT diary app with Flutter and on-device speech recognition. It outlines the architecture, including Flutter for the UI, Whisper.cpp for transcription, and SQLite for local storage. It also covers native integration patterns for iOS and Android, model download and selection, and encrypted local data handling. The piece emphasizes offline processing, privacy, and practical implementation details for deploying speech-to-text on mobile devices.

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