Fly Photos is described as 'Blazing-fast, ultra-lightweight photo viewer for Windows that revives the beloved user experience of the discontinued Google Picasa Photo Viewer . Designed as an ideal replacement, it offers immediate loading of large images — including raw files over 100?' and is a Image Viewer in the photos & graphics category. There are more than 50 alternatives to Fly Photos for a variety of platforms, including Windows, Mac, Linux, Flathub and Flatpak apps. The best Fly Photos alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try IrfanView or XnView MP. Other great apps like Fly Photos are ImageGlass, nomacs, FastStone Image Viewer and XnView Classic.