> But the testing portal doesn’t support the default format on iOS devices and some newer Android phones, HEIC files. HEIC files are smaller than JPEGs and othe

> But the testing portal doesn’t support the default format on iOS devices and some newer Android phones, HEIC files. HEIC files are smaller than JPEGs and other formats, thus allowing you to store a lot more photos on an iPhone. Basically, only Apple (and, more recently, Samsung) use the HEIC format — most other websites and platforms don’t support it. Even popular Silicon Valley-based services, such as Slack, don’t treat HEICs the same way as standard JPEGs.