Will apps fail to download if I'm still on iOS6? I am still running iOS 6 on my iPad.

I have several apps that are failing to download right now (error message is "unable to download update at this time") and I'm wondering if it could be because I am not on the latest OS? 

I have done the following troubleshooting:  


Reset home network
Reset the iPad
Tried to tap on the app needing updates so that it triggers it to start
Verified that my account works fine
Verified free space (10+ gb)


I'm not sure what other troubleshooting I can do, so I thought I'd see here if my OS version was a potential problem or what else I should look into next.
It turned out to be a network issue. 
Even though I had reset my home router, it came down to how far away from the router I was. I guess the iPad couldn't get a stable enough connection to meet the needs of the download (even though the wifi icon on the ipad showed full strength). Moving closer to my wireless router resolved the problem.