Talking about the editing features, it sports a multi-track timeline which means you can add more than one video and audio tracks. You can add background music or record voice-over right there in the app itself. There’s a built-in asset store where you can both free and paid music, clip graphics, fonts, stickers, transitions, and more to enhance your video. Other features include auto audio ducking, speed control for time lapse, and keyframe animation among other things. This is a feature rich video editing app for iPhone and one of the best ones you can find on the App Store.
Videoshop is a powerful video editor for iPhone, that will let you perform a plethora of operations on your videos. You can record clips directly from within the app, or import them from your camera roll. Once you have done that, you can add text to the clip, add narration, merge multiple clips into one, and a lot more. You can also add tilt shift to the video, and add transitions between multiple clips. The tool is definitely very powerful, and you can perform a lot of manipulations on your videos using Videoshop.
Quik is from a newer generation of video editor apps. It's halfway decent if you need something simple. The way it works is you add up to 50 photos and video clips into the app. The app then analyzes them and spits out a short video from them. Quik contains about two dozen video styles and you can re-order and customize your video before you export it. It’s not nearly as powerful as something like Adobe Premiere Clip or PowerDirector, but not everyone needs something that intense. It's free to download with no in-app purchases.