Particle, an AI-powered news app, has significantly enhanced user retention by implementing an AI Voice feature in collaboration with ElevenLabs. This feature, "Listen to the News," offers users an audio version of their personalized newsfeeds, which allows them to engage with content during activities like commuting or exercising. By utilizing ElevenLabs' advanced voice library and API, Particle has recreated the in-app reading experience in audio form, resulting in users who engage with the audio content staying twice as long as before. The natural and human-like quality of the AI voices has been a key factor in this success, as noted by Sara Beykpour, Co-Founder & CEO of Particle.