Fast Image Alignment on iPhone

’m making an iOS app that currently uses OpenCV with AKAZE for image alignment. However, it’s been slow and consumes a lot of RAM, and I haven’t been able to leverage GPU acceleration. I’ve looked for alternatives but haven’t found anything fast or accurate enough. Is there anything in Apple’s Vision framework? I’ve run some tests with it, but they were unsuccessful. If anyone knows of a better approach, I’d greatly appreciate it.