Since update everything is just PDFs

I paid for this subscription because they provided great interactive content on iPad. But as soon as I updated all of the back issues including two I am still reading were changed to PDF format. This is ridiculous. It is now the worst reading experience of all time. Not only that but it messed with my subscription and I had to delete and reinstall everything! I am extremely disappointed and I hope they rectify this issue asap!

Iamlacticburn about Popular Science, v5.3.15