First: of course HEIC is a standard. Second: if you use the Share-option on your iPhone, iOS will automatically convert HEIC to JPEG.
what you additionally should know about HEIC, but never dared to ask 😎:
HEIC vs JPG: File Size
The file size of the HEIC format is smaller than JPG. The images capture and saved with HEIC file format take less storage space as compared to the JPG file format. In fact, HEIC file size is half the size of JPEG file and that’s why HEIC is better than JPEG when it comes to filing size.
HEIC vs JPG: Quality
Another major difference is that the HEIC file has better image quality as compared to the JPG file as the new file format can preserve details of the image.
HEIC vs JPG: Content
HEIC format can hold multiple images in one file, such as live photos, animations sequence, and burst-photo shots. On the other hand, the JPG format can hold only one image in one file. So, without any doubt, HEIC is more flexible than JPG.
HEIC vs JPG: Functions
HEIC file format uses 16-bit deep color, and on the other hand, the JPEG file format uses only 8-bit. So, devices that fully support HEIC new file format can capture a wide array of colors. Moreover, you can modify HEIC images more easily, such as apply changes on numerous layers, like the middle ground, background, and foreground. In addition to it, you can crop and rotate your HEIC images without saving or altering them for a second time. Thus, HEIC is truly good when it comes to editing photos.