TechHala
Work

Consumer app · Education & consumer

Real-time voice companion for conversation practice

A speech-to-speech companion where learners talk with characters that have their own persona, voice, and animated face — the conversational brain we bring to educational robots.

Challenge

Deliver natural, low-latency voice conversations with expressive, lip-synced avatars across iOS, Android, and web — engaging enough that learners keep practicing.

Solution

We built a multimodal pipeline — speech recognition, in-character reasoning with guardrails, high-quality speech synthesis, and lip-synced video — behind a mobile-first experience for creating and talking with companions.

Results

  • Cross-platform release from a single codebase
  • Persona-consistent conversations with custom voices
  • Same pipeline now powering robot conversation and tutoring