I used ZipViewer for a while and found another zip app that works better. I’ve been trying to get the files I opened with ZipViewer saved to my cloud drive, but when I asked on their forum they said the only way to do it is through iTunes. I haven’t used iTunes in a long time, but I tried following their instructions. Apparently now you are no longer able to manage apps through iTunes. I have posted to their forum and sent several emails telling them this, but they won’t respond. It shows that my comment is “awaiting moderation” when I login to their forum, and they won’t respond to emails. Very frustrating. Very unprofessional. I would not recommend ZipViewer to anyone! Apparently if you use the free app and simply want to switch to the pro version this is the same issue. ZipViewer I currently use to unzip is the same as the pro version, just with ads. Now it seems I’m going to lose all of the files I opened with ZipViewer since they won’t help me. I guess they don’t have an answer so it’s easier for them to ignore. I haven’t ever left a bad review for an app, but this is really ridiculous. I hope my review will save someone else from this headache!