I recently generated descriptions for all my photos dating back to 2000 and it was something around 10,000 images and that used just 20% of the weekly limit from Ollama.
I know there are countless apps to get the occasional description. I use a bunch of them myself. I'm probably not 100% objective but in hunting around to solve my problem of describing hundreds and thousands of pictures, I never found a tool to do what I wanted, which is what lead me to start creating IDT.