File Converter: AVIF JXL ODS is a free, lightweight, and easy-to-use app that is able to convert from one format to another. This application is a great tool for both audio and video files, as it supports a wide variety of formats. It is also capable of converting documents or office files, such as e-books, PDFs, and Powerpoint presentations. 

This app allows you bulk conversion, so you don’t have to select files one by one. With this, you can also create animated GIFs from your videos. There are so many things you can do with this. It’s like an all-in-one solution! Not to mention, it has a small app size, so it’s not heavy on your device.