I am collecting resoonses from identical iPads in separate rooms in the same building. Is there a simple way of knowing which answers came from which tablet?
The easiest solution would be to create a separate Share link to use for each of your tablets:
If this is previously collected data you are trying to identify, you may have some luck by examining the meta-data for these responses (browser user agent in specific), but you describe the iPads as identical, so this may be fruitless.
I hope this helps!