Can I use it without an account?
Yes and no. You can use the free version without an account. It’s also possible to subscribe without an OBD Auto Doctor account, with some pitfalls.
If you prefer not to create an OBD Auto Doctor account, you can subscribe to the mobile apps without one.
Just follow the instructions when not logged in.
However, in this case, the subscription is tied to your Apple or Google account, respectively. Therefore, it’s not possible to use the subscription outside the platform.