Quik

Quik is a free advanced photo editing app from GoPro. It's packed with features that can be used to edit both photos and videos. The extensive editing features include:

• Edit and save videos in 7020p and 1080p (HD)
• Cut out unwanted portions of a video
• Splice together multiple videos
• Add transitions between segments
• Make a slide show from your photos
• Add text overlays using a huge variety of font styles and filters.

The app has a limit of 50 videos and 50 photos, which is its only drawback.