Ethics approval for an independent project akin to a survey
Let an IRB or equivalent make the call on this, not random strangers on the internet. I suspect, but haven't seen the research design, that you would get permission. But if you don't ask them, you don't have permission. 

But, if you do it without permission, and are asked by a journal for your documentation on ethics approval but don't have it, you are a bit stuck as retroactive permission is (many places) not permitted. 

It isn't you (or us) that gets to judge this. It is whatever ethics board is appropriate and whichever journals you might want to submit the research to. 



For the record, there are some exceptions under the law (some places) to the requirement of getting permission, but most things require it whenever human subjects are involved.