Long story short, I need to turn off data sharing between company and personal applications on iPhones. This means, I can't do an app protection policy on the camera and gallery for iPhones without pissing them off. On Android for Work, I just added Open Camera and Google Photos (Gallery) and then will restrict them to the Work Profile only.
I do have OneDrive, but OneDrive requires an internet connection to take pictures, which will work about 75% of the time. But the other 25% of the time, they won't have a cellular or internet connection.
I'm not as familiar with the iOS infrastructure though. Are there some good camera apps and galleries that are lightweight and safe to use? I want to give users a separate camera and gallery to use for work.