First, read the English article below.

A few different options should exist in both the Android and iOS app store. Be sure to read through the reviews before downloading, both to assess the overall quality of the app and to ensure that your specific conversion will be covered Once selected, download the app. You should also download your image file (if you haven't already) and make a note of where it is located on your device. Some apps may detect your images automatically while others may require you to locate the file on your own. Once downloaded to your mobile device, image conversion with an app should be a simple process of opening the app and following the instructions. 

Now, please write a short abstract for it in Chinese. Abstract:
搜索图片转换应用程序。 下载图片转换器。 转换图片。