Startups & appsConsumer Android app

50,000+ people use it to change their voice on a live phone call

Funcall changes your voice in real time, mid-call, without lag. That's one of the hardest problems in mobile audio, and it had to be fun from the first tap to win on the Play Store.

Get it on Google Play

Product: Funcall
Platform: Android
Team: Both founders
Status: Live on Google Play

FunCall app screens: voice picker, a live call with the female voice active, and the dialler

50,000+downloads on Google Play

4.4★from 246 reviews

100+live calls every day

Before

The idea was simple: make prank and fun calls with a different voice. The engineering wasn't. Audio has to be captured, transformed and played back within milliseconds, or the call sounds broken and users uninstall.

What we built

01
Live voice filters
Female, male, kid and robot, applied during the call.
02
Sound effects on demand
Mid-conversation.
03
A low-latency audio engine
Built natively for Android.
04
A playful interface
Your first call works on your first tap.
05
Play Store launch
Launch and listing.

“Changing a voice live on a call is hard to get right. They made it work without lag, and kept the app simple enough that people get it on the first tap.”

Nishant Saraf