The quality of the prediction also matters on the quality of the photo. I tried the photos that I do have of myself online, which each have a distinct lighting

The quality of the prediction also matters on the quality of the photo. I tried the photos that I do have of myself online, which each have a distinct lighting profile. One is a soft, orange glow in a restaurant... the guess was off by +11 years. The next photo has a portion of the left side of my face obscured by shadow. This was off by something like +31 years.