A Tool For Android and iOS 

One application that you can use to edit videos on both Android and iOS is, for example, KineMaster. 

Like all other applications presented here, the video editing app offers numerous functions. It is easy to use: the video editor provides a multi-lane timeline.

With the practical drag-and-drop operation, you can quickly move photos, video clips, and audio files with your finger. 

Both Android and iOS offer extensive video editing options and an equally impressive selection of functions for improving video quality. 

The scope of the free app is considerable. The only disadvantage is the slow export of cut videos. 

GoPro's Video Editor Splice 

GoPro is best known for its ActionCams - but less as an application for video editing. The Splice application can be downloaded for the iPhone and iPad. 

The app offers a wealth of functions: cut clips, define excess lengths, add slow-motion effects, and a large selection of filters with which you can determine the background color of your videos. The cutting function is also easy to use. 

There is one downer: Splice automatically adds an outro with its company logo design to the cut video. You can easily deactivate the automatic. 

The application is particularly suitable for users who like to deal with apps. If you enjoy doing it and tinkering with it, you will have no problem understanding how it works.

Otherwise, English-language help files are available and explain the functions to you in great detail.