HEICHEIFAVIF - JPG Converter is an Android app developed by Banana Studio in the Multimedia category, specifically for Photography. The app allows users to convert HEIF/AVIF format to JPEG, PNG, and vice versa without losing any metadata. It also has a feature to convert media such as video and audio to MP3, FLAC, ALAC, OGG, AAC, AC3, and more.

HEIF images are a file format used by Apple for storing images on iPhones and Macs, and currently, Android devices do not support AVIF images. The app aims to help users convert these images to more popular formats such as JPEG, PNG, or WEBP.

The app's features include keeping all metadata information of HEIF images and transforming it to the target image, a history tracker to keep track of previously converted files, a built-in media viewer to open converted files, and the ability to share files from other apps to the app for converting. The app has an easy-to-use interface and works offline without the need for an internet connection.

Overall, HEICHEIFAVIF - JPG Converter is a useful app for those looking to convert HEIF/AVIF images to more popular formats without losing any metadata.