Help you to add background music to videos.
STEPS:
1. Add source videos
2. Add background music from library or record your voice
3. Start merge and preview
4. Save to Camera Roll or share to Instagram, Facebook, YouTube
The result video will be saved to the Camera Roll. You can then open Camera Roll to start sharing.
TIPS:
- Control volume of the original videos, music and records
- Using range slider to trim video, music, record
- You can add as many videos, music and records as you want
Fix bug
From v6.0
+Add text on video
+Add video in video
+Fix vertical video
iFunBox Pro 
Combine Videos Pro - Merge/Join/Trim/Cut/Add Effect to Video 
iScreen Video Maker - Add annotation, music,voice record to my own screen shots 