I’d like to build an app without any login or user identification but the app itself would require terms and conditions to be accepted. If I’d require to accept the terms prior entering the actual app, would that ”contract” be legal even thought I would not have any prove about the contract with some identified person? (Only the code would prove that you have to accept terms before using the app)
Yes, anonymous contracts are valid
For example, when I buy groceries I rarely identify myself.
However, you will have virtually no chance of enforcing them because you have to sue an identified person.
Well in the case of an app, you would have an IP for the person. Yes, that would only be identifiable in some cases, but in the cases where it is, it would allow you to sue.
If you can not find the person, you shut down access from that IP.