Calling used to be SCARY

Cello gives you a safe space to practice phone calls, so when the real ones come, you are ready.

Nearly half of young people actively avoid phone calls due to lack of confidence

Choose from 20+ real-life situations. Doctors, landlords, internship coordinators, or even ordering pizza. Start easy, go harder as you grow.

Cello uses AI to detect your voice. You actually have to talk. No more silent rehearsals. The more you speak, the more confident you become.

Receive instant insights on your tone, pacing and confidence. Watch your confidence grow together with scores.