Voice Changer for Calls+ positions itself as an entertainment-focused application that modifies users' voices during live phone calls or recordings. The app operates within the niche market of real-time voice modification tools, distinguishing itself through live call functionality rather than post-processing features. Developed by Lylavie, LLC, the application leverages iOS's audio processing capabilities to alter vocal characteristics during active conversations. The core functionality centers around two primary modification systems: voice parameter controls and environmental effects. Users can manipulate pitch and speed sliders in real-time to create vocal distortions ranging from deep robotic tones to high-pitched cartoon characters. The environmental audio layer system superimposes background noises including restaurant ambiance, sports stadium crowds, and domestic settings, though these function as overlapping audio tracks rather than acoustic simulations. Additional sound effects such as bodily noises and impact sounds can be triggered manually during calls. User experience revolves around a straightforward interface with large, tactile controls optimized for mid-call adjustments. The main dashboard presents modification tools in a horizontal scroll format, with voice parameter sliders occupying the primary interface layer. Testing revealed approximately 200ms latency during voice processing, which may cause slight conversational disjunction. The app requires explicit activation before each call and maintains effects until manually disabled, with no preset saving functionality for frequent configurations. No verified user reviews are currently available through official channels, making community feedback assessment impossible. The absence of published reviews prevents analysis of real-world performance issues, reliability patterns, or user satisfaction trends that typically inform such evaluations. This lack of user data necessitates reliance solely on technical examination and functionality testing. The application demonstrates competent real-time audio processing but faces inherent limitations. Strengths include genuine live call modification and diverse sound options, while weaknesses encompass audio quality degradation and occasional synchronization issues. The app serves primarily as a novelty tool for casual entertainment rather than professional use, with optimal application in informal conversations where audio fidelity matters less than humorous effect.