Some sort of manual export/import or sync function is absolutely essential to this app realising it’s full potential.
What is the point of saving observations if there is no way to permanently keep the data?
I can’t see how a well implemented sync function would compromise privacy in any way.
Please reconsider your approach here, I just started saving observations the other day, and made an account with the hope that doing so would sync or backup my observations, and was surprised to find this isn’t the case. If there is absolutely no future plans for this then there is no reason for me to save observations or engage in the community aspects of the app.