A voice tutor embedded into a language app

The challenge

The app taught vocabulary but learners had nowhere to actually speak, so engagement plateaued.

Real-time conversational voice was the missing piece and too costly to build alone.

The solution

The team embedded voice into their own app via the MyChatBot Web Voice SDK:

• Voice inside the app, the MyChatBot Web Voice SDK adds inbound (WebRTC) and outbound (Twilio/SIP) calls with a few lines of JS.
• Own voice and instructions, each AI voice agent gets its own voice, language and prompt, fully under the team's control.
• Client-side tools, the agent calls the app's own functions mid-call, navigating the UI, searching, booking, updating records.
• Persistent callers, defaultCallerId keeps a stable identity across sessions, so context follows the user.
• Scales with usage, minute bundles and per-minute overage mean the same SDK serves a prototype and a production app.

A voice tutor shipped in a week and daily active users rose 41%.

What was deployed