Based on the users' reviews, here are three pros and cons of the Voice Changer with Echo Effect app: **Pros:** 1. **Easy to use**: Simple interface makes it easy to change voice and add echo effects, even for non-techies. 2. **Good quality effects**: Users praise the app's realistic and high-quality voice changers and echo effects. 3. **Humerous fun**: Users enjoy using the app to create humorous voice messages and prank calls on friends and family. **Cons:** 1. **Limited customization**: Some users wish for more customization options for voice changes and echo effects. 2. **Occasional lagging**: A few users report experiencing lagging or delayed audio playback while using the app. 3. **Limited export options**: Users wish for more export options, such as being able to save recordings directly to their device.