Not reading exif data of ipad

[Ekta09]

I appreciate your efforts for making such a nice tool. I want to retrieve 35mmEquivallent Focal length of all iphone's and ipad. It retrieves for iphon6, iphone6 plus, iphone5 but It is not getting of iphone5S and all models of ipad. Can you please help me regarding this ?
Thank you so much for your help in advance.

[mattburns]

I'm very busy at the moment but I can take a look to see if it's an easy fix. Do you have some sample photos I can test with?