If you're looking for an efficient and user-friendly application for converting image file formats to JPEG or PNG, then look no further than JPEG-PNG Image File Converter. This app, developed by handyCloset Inc., is free to download and is compatible with iPhone devices. With this application, you can easily convert a wide variety of image formats, including JPEG, JPG, PNG, GIF, BMP, TIFF, TGA, and even HEIF (.heic) files.

One of the most convenient features of this app is that it saves all converted images to the preinstalled "Photos" app on your device. Additionally, albums named "JPEG" or "PNG" are automatically created for easy organization. If you're having trouble printing PNG image files, this app can help you out by converting them to JPEG files, which are more widely supported by printers. However, it's important to note that transparent colors will be converted to "White" color when images are saved as JPEG files since JPEG files don't support transparent colors.

Overall, JPEG-PNG Image File Converter is a great tool for anyone who needs to convert image files quickly and easily.