Do you have to delete these values by accident?
Is there a more efficient way than this?
Sorry for english "Google Translate" =D
I've always saved the progress or any other data within my apps with the Local Storage Plugin. This far, I've never experienced any problems with it so I would say that it is the best way to do it. I don't think there is any other simple way of storing data locally on the user's device.
Develop games in your browser. Powerful, performant & highly capable.
Thank you =D
I was afraid of this method but now I'm safer