That is taking photos faster then HD videos in just pictures. Technological advancement is great but that is to many photos.
That makes scence but some apps can go a little over but 500 over is weird, even 200 over is weird too.
How is it possible to take 601 photos with an iphone 5s? Because apple says that the iphone take 10 photos a second when in burst mode, and I don't think that any app can take 6 times more then the phone is designed to do.