Photo Mechanic is described as 'Plug in your memory cards and start picking winners and deleting rejects almost instantaneously. Move from image to image without that annoying rendering delay. Add dynamic caption, copyright, and keyword information individually or in batches' and is a Image Viewer in the photos & graphics category. There are more than 50 alternatives to Photo Mechanic for a variety of platforms, including Windows, Mac, Linux, Flathub and Android apps. The best Photo Mechanic alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try IrfanView or RapidRAW. Other great apps like Photo Mechanic are digiKam, darktable, nomacs and FastStone Image Viewer.
FilterPixel has automated the photo culling. Love it as it saves time for my family & business by automatically tagging the blurry, out-of-focus photos with errors & select the best from similar photos.